OPINION
delivered the opinion of the Court
in which PRICE, WOMACK, JOHNSON, KEASLER, COCHRAN, and ALCALA, JJ., joined.
Applicant, Michael LaHood, was convicted of aggravated kidnapping and aggravated sexual assault. On direct appeal, the Fourteenth District Court of Appeals affirmed his convictions in a published opinion. LaHood v. State, 171 S.W.3d 613 (Tex.App.-Houston [14th Dist.] 2005, pets, ref'd). We subsequently refused his petitions for discretionary review. Applicant now files these applications for a writ of habeas corpus alleging, in part, that he received ineffective assistance of counsel because his trial counsel failed to investigate his mental-health history, and if she had, there was a reasonable probability *48that the outcome of his proceeding would have been different. The trial court entered findings of fact and conclusions of law recommending that we deny relief. We will deny relief.
I. PROCEDURAL HISTORY
Applicant committed aggravated kidnapping and aggravated sexual assault on or about September 3, 2003. He was found guilty of both charges by a jury. His punishment was assessed at thirty years’ imprisonment in each case to run concurrently. On direct appeal, the Fourteenth District Court of Appeals affirmed the judgment of the trial court. LaHood, 171 S.W.3d at 625.
On May 7, 2007, Applicant filed the instant applications for a writ of habeas corpus, in which he claimed that his trial counsel was ineffective.1 The State filed its answer and argued that, to resolve Applicant’s claims, more information was needed from Applicant’s trial counsel regarding her “pre-trial investigative efforts, strategic decisions, and confidential communications with Applicant.” The habeas court agreed and entered an order designating the issues and directing Applicant’s trial counsel, Leah Borg, to file the proposed affidavit. Ms. Borg filed her first affidavit on October 17, 2007.2 Applicant then filed an affidavit by J. Ray Hays, Ph.D., J.D., a mental-health expert, to support Applicant’s claim that his counsel should have been aware that he was incompetent to stand trial. In addition, Applicant’s father, Colonel (Ret.) George A. LaHood, filed an affidavit disputing certain statements made by trial counsel in her initial affidavit. A few weeks later, Applicant filed an affidavit from mental-health expert Victor R. Scarano, M.D., J.D., which addressed trial counsel’s affidavit and Applicant’s competency. Trial counsel then filed her second amended affidavit (her third affidavit chronologically) to respond to claims raised by Applicant in his amended application. Finally, Applicant filed additional supporting affidavits from another criminal-defense attorney, the custodian of records for the Harris County District Clerk’s Office, Applicant’s former wife, Elizabeth Patterson, and the custodian of records for the Harris County Sheriffs Office.
On April 19, 2009, the habeas court recommended denying Applicant’s claims for relief. However, we remanded the applications for additional fact-finding and to supplement the record. See Ex parte Lahood, Nos. WR-72,580 & WR-72,580-02, 2011 WL 2369392, at *1 (Tex.Crim.App. June 8, 2011) (per curiam) (not designated for publication). Specifically, we remanded for further fact-finding regarding whether Applicant was able to make an informed, knowing, and intelligent decision to testify and to supplement the record “with the notes trial counsel references in her affidavits that she states Applicant made during trial.”3 Id. If those notes could not be provided, the trial court was directed to make factual findings regarding the reasons why. Id. On remand, trial counsel filed a fourth affidavit responding *49to this Court’s remand order, the State filed a brief, State’s Supplemental Answer After Remand,4 and Applicant filed a brief objecting to the State’s supplemental answer and a second affidavit, in which Dr. Scarano reviewed documentation made available to him after submission of his original affidavit. On November 17, 2011, after considering the additional information, the habeas court again recommended denying relief.
Based on the additional findings of fact and conclusions of law made by the trial court, we filed and set the applications and ordered the parties to brief the following three issues:
1. Whether trial counsel, under Strickland v. Washington, 466 U.S. 668 [104 S.Ct. 2052, 80 L.Ed.2d 674] (1984), was deficient for not bringing to the trial court’s attention, either before or during trial, evidence of Applicant’s alleged incompetency to stand trial.
2. Assuming trial counsel was deficient for failing to alert the trial court to the alleged incompetency, whether Applicant was harmed by counsel’s actions under Strickland v. Washington, 466 U.S. 668 [104 S.Ct. 2052, 80 L.Ed.2d 674] (1984), and how the determination of harm should be made considering this Court’s holdings in Sisco v. State, 599 S.W.2d 607 (Tex.Crim.App.1980), Barber v. State, 737 S.W.2d 824 (Tex.Crim.App.1987), Williams v. State, 663 S.W.2d 832 (Tex.Crim.App.1984), and their progeny.
3. Assuming deficient performance and resulting harm are shown under Strickland v. Washington, 466 U.S. 668 [104 S.Ct. 2052, 80 L.Ed.2d 674] (1984), whether the proper remedy is to order a retrospective competency inquiry or to grant a new trial. See, e.g., Barber v. State, 737 S.W.2d 824 (Tex.Crim.App.1987); Caballero v. State, 587 S.W.2d 741 (Tex.Crim.App.1979).
Ex parte Lahood, Nos. AP-76,873 & AP-76,874, 2012 WL 3996712 (Tex.Crim.App. Sept. 12, 2012) (per curiam) (not designated for publication).
II. INEFFECTIVE ASSISTANCE OF COUNSEL
A defendant has a Sixth Amendment right to effective assistance of counsel. U.S. Const. amend. VI; see Strickland v. Washington, 466 U.S. 668, 104 S.Ct. 2052, 80 L.Ed.2d 674 (1984). Ineffective-assistance-of-counsel claims are cognizable on habeas review, and to determine whether to grant habeas relief for ineffective assistance of counsel, Texas courts apply the standard set forth in Strickland. See Ex parte Martinez, 330 S.W.3d 891, 900 (Tex.Crim.App.2011); Hernandez v. State, 726 S.W.2d 53, 55-56 (Tex.Crim.App.1986). The Strickland standard requires that an applicant establish two components by a preponderance of the evidence: (1) deficient performance of trial counsel and (2) harm resulting from that deficiency sufficient to undermine confidence in the outcome of the trial. Strickland, 466 U.S. at 687, 104 S.Ct. 2052. The proper standard of review for claims of ineffective assistance of counsel is whether, considering the totality of the representation, counsel’s performance was ineffective. See Thompson v. State, 9 S.W.3d 808, 813 (Tex.Crim.App.1999) (citing Ex parte Felton, 815 S.W.2d 733, 735 (Tex.Crim.App.1991)).
An attorney’s performance is deficient when it falls “below an objective *50standard of reasonableness” under prevailing professional norms and according to the necessity of the case. Ex parte Moore, 395 S.W.3d 152, 156-57 (Tex.Crim.App.2013). We refer to standards published by the American Bar Association and other similar sources as guides to determine prevailing professional norms. Strickland, 466 U.S. at 688-89, 104 S.Ct. 2052 (citing ABA Standards for Criminal Justice (2d ed.1980)). However, publications of that sort are only guides because no set of detailed rules can completely dictate how best to represent a criminal defendant. See id. at 688-89, 104 S.Ct. 2052. We begin the analysis of counsel’s performance with a strong presumption that her actions fell within the wide range of reasonable professional assistance. Id. at 689, 104 S.Ct. 2052; see Frangias v. State, 392 S.W.3d 642, 653 (Tex.Crim.App.2013).
One necessary facet of professional assistance is the investigation of the facts and law applicable to a case. Counsel has a duty in every case to make a reasonable investigation or a reasonable decision that an investigation is unnecessary. Strickland, 466 U.S. at 691, 104 S.Ct. 2052; see Ex parte Imoudu, 284 S.W.3d 866, 870 (Tex.Crim.App.2009). “When assessing the reasonableness of an attorney’s investigation, a reviewing court must consider the quantum of evidence already known to counsel and whether the known evidence would lead a reasonable attorney to investigate further.” Ex parte Martinez, 195 S.W.3d 713, 721 (Tex.Crim.App.2006).
An attorney’s deficient performance prejudices an accused when there is a reasonable probability that the outcome of the trial would have been different but for counsel’s deficiency. Cox v. State, 389 S.W.3d 817, 819 (Tex.Crim.App.2012). We have defined a reasonable probability as “a probability sufficient to undermine confidence in the outcome.” Id. (quoting Strickland, 466 U.S. at 694, 104 S.Ct. 2052).
A. Trial counsel was deficient when she made an unreasonable decision not to investigate Applicant’s mental-health history.
Applicant argues that his trial counsel observed evidence of his lack of mental health before trial, at his trial, and during the sentencing phase. He contends that his trial counsel’s failure to follow up on the various indicia of his alleged incompetency fell below prevailing professional standards and, as a result, her performance was constitutionally deficient. We agree.
Relevant American Bar Association standards state that “[djefense counsel should consider all procedural steps which in good faith may be taken, including, obtaining psychiatric examination of the accused when a need appears.... ” ABA Standards for Criminal Justice: Prosecution and Defense Function 4-3.6 (3d ed.1993). This standard, though not binding, appears to comport with the applicable standard at the time of Applicant’s trial— whether defense counsel had or should have had a bona fide doubt as to Applicant’s competency. Standard 4-4.1, titled “Duty to Investigate,” states in part, that “[d]efense counsel should conduct a prompt investigation” and explore all avenues leading to relevant facts of the case. Id. at 4-4.1.
In trial counsel’s affidavits, she described her client as having a “misogynistic attitude with a need to dominate and exercise control over women....” She also stated that Applicant is a malingerer and “engaged in ... antics designed to create the illusion of incompetency, but which appeared to be nothing more than an act.” To support her assertions, she cites to *51pages of cogent notes written by Applicant during trial, but she can no longer locate the notes in question. She does acknowledge, however, that Applicant told her he was bipolar and was prescribed Zoloft, Risperadol, and Zyprexa. She also stated that a mental-health pretrial screening sheet for Applicant related to a prior sexual-assault case indicated that he had an alcohol dependency problem, was bipolar, and was prescribed Lithium, Prozac, and Lidicin. Although the record does not reveal when that screening took place, it shows that Applicant has had previous mental-health issues. Moreover, trial counsel admits that Applicant was on medications for his mental illness and that, without his medication, he could become incompetent:
These medications are what I have observed in the past to be prescribed to persons who have been found “incompetent, but who have a substantial probability of regaining competency” through the use of medications. The fact that Applicant was taking these medications I believed was further support to my conclusion that Applicant was legally competent.
First Amended Affidavit Trial Counsel at 3.
In addition, Applicant’s father stated in his affidavit that trial counsel never called him, and he didn’t speak with her for the first time until he called her about a week before trial. He explained that, during their conversation, he told her about his son’s mental illness and need for his medications. But trial counsel stated that she did not recall any family members telling her that “Applicant had any mental-health history that would make him legally incompetent, even though he may have mental health issues.” In addition to Applicant’s father, Applicant’s ex-wife, Elizabeth Patterson, stated that she told trial counsel that she had important information concerning Applicant’s mental-health history, including how his illness and drugs and alcohol have affected him. She also asserts that trial counsel never called her to testify in the guilt phase, even though she was present in the courtroom when Applicant was found guilty. In short, the record shows that trial counsel thought Applicant had mental-health issues but was competent to stand trial, and she came to this conclusion despite speaking with Applicant, his father, and Applicant’s former wife. See First Amended Affidavit of Trial Counsel at 3 (“My observations of Applicant and interactions with him did not lead me to believe that he was legally incompetent, therefore I did not believe that it was necessary to request a competency evaluation.”).
At trial, new signs of Applicant’s potential mental instability arose. During the guilt phase of the trial, Applicant engaged in multiple outbursts and claimed that he was not receiving his required psychoactive medications in jail. For example, on the second day of his testimony, Applicant complained that he was having difficulty understanding the proceeding and that he was seeing lights blink. After these statements, the trial court recessed the proceeding for the day. It appears that counsel believed that she did not need to suggest that her client was incompetent to stand trial because the court took breaks to accommodate Applicant before ultimately recessing for the day. But the statutory duty of a judge to suggest that a defendant may be incompetent to stand trial should not be confused with counsel’s obligation to make a reasonable decision to investigate and to raise relevant issues to protect the client. This is especially so when counsel’s belief as to a medical issue is based on her own lay opinion, even though she knew Applicant had mental-*52health issues in the past and was taking medications that gave him, in her estimation, a “substantial probability of regaining competency.” Applicant’s medical records from the jail were easily accessible and contained significant information (including evidence of a suicide attempt during the trial) that could have allowed his attorney to assert that he was incompetent. After reviewing the quantum of evidence known to counsel before and during trial, and whether the known evidence would lead a reasonable attorney to investigate further, we conclude that trial counsel’s failure to further investigate was unreasonable under the circumstances. See Ex parte Martinez, 195 S.W.3d at 721; see also Roberts v. Dretke, 381 F.3d 491, 498 (5th Cir.2004) (stating that trial counsel must investigate a client’s mental-health history if he has a reason to believe his client suffers from mental-health issues); Bouchillon v. Collins, 907 F.2d 589, 597 (5th Cir.1990) (“It must be a very rare circumstance indeed where a decision not to investigate would be ‘reasonable’ after counsel has notice of the client’s history of mental health problems.”); Beavers v. Balkcom, 636 F.2d 114, 116 (5th Cir.1981) (holding that defense counsel has an obligation to obtain medical records and to speak with his client’s doctors).
B. Applicant was not prejudiced because there was not a reasonable probability that the fact-finder would have found Applicant incompetent to stand trial.
Having decided the trial counsel’s performance was deficient, we now turn to the question of
whether Applicant was harmed by counsel’s actions under Strickland v. Washington, 466 U.S. 668 [104 S.Ct. 2052, 80 L.Ed.2d 674] (1984), and how the determination of harm should be made considering this Court’s holdings in Sisco v. State, 599 S.W.2d 607 (Tex.Crim.App.1980), Barber v. State, 737 S.W.2d 824 (Tex.Crim.App.1987), Williams v. State, 663 S.W.2d 832 (Tex.Crim.App.1984), and their progeny.
The Supreme Court’s prejudice standard in a Strickland analysis is flexible and must be applied in many different contexts. For that reason, we review the relevant competency laws and Strickland cases to resolve how Applicant can prove prejudice in this context and, ultimately, whether he was prejudiced and entitled to relief.
At trial, the issue of incompetency must have first been raised by either a party to the case or the trial court. See Tex.Code Crim. Proc. art. 46B.004(a), (b) (2004) (allowing either party or the trial court to suggest that the defendant may be incompetent to stand trial). But regardless of whether a party or the trial court was the one to make such a suggestion, a trial court was not authorized to initiate an informal inquiry to determine a defendant’s competency unless the evidence of incompetency was “sufficient to raise a bona fide doubt in the mind of the judge whether the defendant [was] legally competent.” Montoya v. State, 291 S.W.3d 420, 425 (Tex.Crim.App.2009); see Gonzales v. State, 313 S.W.3d 840, 841-42 (Tex.Crim.App.2010). Assuming that the court harbored a bona fide doubt, then it initiates an informal inquiry to determine if “there is some evidence from any source that would support a finding that the defendant may be incompetent to stand trial.” Tex.Code Crim. Proc. art. 46B.004(c) (2004). We have held that the court is “to assay just that evidence tending to show incompetency, putting aside all competing indications of competency, to find whether there is some evidence, a quantity more than none or a scintilla, that rationally may *53lead to a conclusion of incompetency.”5 If the judge finds “some evidence” in the record that “rationally may lead to a conclusion of incompetency[,]” then a trial within a trial should be held on the issue of the defendant’s competency. Tex.Code Crim. Proc. art. 46B.005(b) (2004); Sisco, 599 S.W.2d at 614. Thus, the determination of competency is not decided unless the court holds a trial to determine competency, which is authorized only if the court has a bona fide doubt that the defendant is not competent and, after assaying the evidence, it finds some evidence that the defendant is incompetent. See Morris v. State, 301 S.W.3d 281, 287 (Tex.Crim.App.2009).
Article 46B.003(a) states that a person is incompetent to stand trial if the person does not have (1) “sufficient present ability to consult with the person’s lawyer with a reasonable degree of rational understanding” or (2) “a rational as well as factual understanding of the proceedings against the person.” Tex.Code Crim. Proc. art. 46B.003(a) (2004); see Strickland, 466 U.S. at 695, 104 S.Ct. 2052 (“The governing legal standard plays a critical role in defining the question to be asked in assessing the prejudice from counsel’s errors.”). We have stated that the factors experts use in conducting a competency evaluation are also helpful to the fact-finder in determining the broader question of competency. See Morris, 301 S.W.3d at 286 n. 10; see also Tex.Code Crim. Proc. art. 46B.024 (2004). These factors include whether a defendant can
(1) understand the charges against him and the potential consequences of the pending criminal proceedings; (2) disclose to counsel pertinent facts, events, and states of mind; (3) engage in a reasoned choice of legal strategies and options; (4) understand the adversarial nature of criminal proceedings; (5) exhibit appropriate courtroom behavior; and (6) testify.
*54Morris, 301 S.W.3d at 286 n. 10. A person is presumed to be competent, and the burden is on a criminal defendant to prove incompetency by a preponderance of the evidence. Tex.Code Crim. Proc. art. 46B.003(b) (2004).
The focus of the prejudice inquiry here is whether an applicant can show that there was a reasonable probability that he would have been found incompetent to stand trial if the issue of competency had been raised and fully considered.6 See Strickland, 466 U.S. at 695, 104 S.Ct. 2052. This is true because, under Texas law, even though there are conditions precedent that must be met to obtain a trial on competency, the only way the outcome of the guilt phase of the proceeding would be different is if the defendant proved that he was incompetent to stand trial. Anything less than a finding of incompetence would not have changed the outcome.7 In assessing prejudice, we look to the entire record. Id.
After reviewing the trial and writ records, we are of the opinion that Applicant was not prejudiced by his trial counsel’s deficient performance because he has not met his burden of proof that, but for his trial counsel’s deficient performance, there is a reasonable probability that a fact-finder would have found him incompetent to stand trial. Based on Dr. Scara-no’s testimony, Applicant argues that the lack of medication given at the jail — as well as the increase in dosage at the time of trial — caused Applicant to mentally de-compensate. This decompensation, he stated, could include distorted perceptions of reality, interference with the thinking process, poor reasoning, and hallucinations. If true, Applicant argues, his insistence on testifying could not have been made with a reasonable degree of rational understanding, and trial counsel refused to recognize this because she believed Applicant was a malingerer.
Immediately before the State rested, the judge asked if Applicant would testify. In response, “Applicant expressed confusion, surprise, and a lack of understanding about the lack of witnesses and the defense plan. Pressed by counsel about testifying, Applicant said he felt ‘coerced,’ but ultimately agreed to testify.” However, trial counsel stated in an affidavit found credible by the habeas court8 that, Applicant told her before trial that he wanted to testify, and he relayed a version of events *55that he said his ex-wife could verify. Following up on the lead, counsel contacted Applicant’s ex-wife, Elizabeth Patterson, who initially agreed with Applicant, but she quickly admitted that Applicant had asked her to lie. When counsel confronted Applicant, he confirmed that he told Patterson to lie, and “[he] got very defensive with [counsel] and said essentially, ‘I’m gonna say what I’m going to say and how I want to say it. You don’t need to go over it with me.’ ” Applicant made this statement at trial counsel’s visit with him before the trial began on April 20, 2004. However, Applicant claims that he was not properly medicated beginning April 25, 2004, the day before his trial began. Thus, Applicant made the decision to testify before trial when he was correctly medicated. And when he did state that he would testify at trial, the following exchanged ensued:
MS. BORG: And, Mr. LaHood, did you just make a comment to me that you thought you were being coerced?
[APPLICANT]: Yes, I feel coerced.
MS. BORG: Have you previously expressed to me your intention to testify on your own behalf?
[APPLICANT]: I — as a last result (sic) due to your advice, that I don’t take the stand, I will want to leave the option if I feel like — because my life — you know, I want to get up there and say my side of the story if, you know, if I think — if my personal opinion, that it will help me, but until — I want you to go through — I want to hear from the police officer, I want to hear from a forensic expert on these test results. I want to build some kind of — I mean, I want that to be concluded and then if I think we haven’t shown reasonable doubt, I will gladly get up there and bare all because I know it’s — what’s going to happen if I get up there. He’s going to cross-examine me.
This shows that Applicant engaged in a reasoned choice of legal strategies and options. Being compelled to take the stand is a violation of a person’s constitutional right to not self-incriminate. See Johnson v. State, 357 S.W.3d 653 (Tex.Crim.App.2012); Chapman v. State, 115 S.W.3d 1 (Tex.Crim.App.2003). In Applicant’s case, however, he was simply faced with the risky choice of testifying in his own defense if counsel could not establish reasonable doubt. He also acknowledged that he understood the adversarial nature of the proceedings, when he stated that he knew he would be exposed to cross-examination if he testified, which might require him to “bare all.”
Applicant points to his bizarre behavior at trial, which he attributes to not receiving his medications, to demonstrate a lack of competence. The mis-administration of Applicant’s medications began the day before the trial, on April 25, 2004. The State rested the next day, and Applicant took the stand for about an hour. The habeas court found that Applicant testified during this time with no problems, and Applicant’s objections do not directly dispute this assessment. In fact, Applicant was able to shift back and forth to different time periods in his story. He also relayed a detailed account of his version of events in a constant effort to undermine the victim’s testimony by alleging that she testified against him because he attempted to contact his ex-wife, and that the victim wanted to go to Houston to “get good dope.” At one point, while testifying about himself and the victim picking up materials to make methamphetamine, he stated that he did not want to incriminate himself. Counsel asked Applicant if he realized that his testimony “doesn’t sound real good to a jury,” and he responded, “That’s the truth, you know.” The following day, Applicant’s behavior deteriorated. *56For example, he stated that the lights were blinking. Later he stated that he needed his medication. However, between those outbursts, Applicant advised that he wanted certain medical records subpoenaed as part of his defense. After the comment about his medication being withheld, the trial court recessed for the day. The following day, Applicant concluded his testimony and explained that his medication situation had been remedied. Nonetheless, Applicant continued to talk when he was not supposed to and did not answer questions as he was directed to do, but he made no further complaints of hallucinations or of not understanding the proceeding.9 Applicant’s experts indicate that the mis-administration of psychoactive medications would produce the behavior exhibited by Applicant, but our review of the record indicates that Applicant was competent during his testimony because (1) he was able to disclose pertinent facts and events of the case, (2) he understood the adversarial nature of the proceedings, and (3) he put on a defense with a competing theory of the events that would have resulted in a not guilty verdict if the jury believed him.
Finally, Applicant argues that his suicide attempt after he was found guilty, but before he was sentenced, shows that there was at least a reasonable probability that he would have been found incompetent to stand trial. The medical records indicate that on April 30, 2004, Applicant returned from the hospital with a self-inflicted laceration to his left wrist. At his initial medical screening at the jail, Applicant denied any suicidal ideations and complained that he was dissatisfied with his court case and his prescriptions. One day later, on May I, 2004, Applicant contradicted himself and told another screener that he was not getting his depression medications and he still felt depressed and suicidal. The screener did note, however, that Applicant appeared “mildly depressed” but had a cooperative attitude and goal-directed speech. Although an attempted suicide is disturbing, it does not necessarily prove that a person lost the ability to meaningfully consult with his attorney or that he lacked a rational and factual understanding of the charged offense and trial proceedings. “A person may be suffering from a severe mental disease or defect or he may be highly medicated, but he will be competent to stand trial if he still has the ability to meaningfully consult with his attorney and he had a rational as well as factual understanding of the charged offense and trial proceedings.” Ex parte Thomas, No. WR-69,859-01, 2009 WL 693606, at *5 (Tex.Crim.App. Mar. 18, 2009) (Cochran, J., concurring) (not designated for publication).
Even if Applicant failed to receive some of his medication, there is nothing in the record that leads us to believe Applicant lost the ability to understand the proceedings or rationally confer with his counsel. To the contrary, the only time at which Applicant possibly appeared legally incompetent, the trial was stopped and the medication problem was corrected. Moreover, the record supports many of the habeas court’s findings that Applicant’s behavior was that of a competent person. For example, the habeas court concluded that Applicant’s direct examination showed considerable clarity of thought, his outbursts regarding medication and lack of compre*57hension began only on cross-examination, and the only opportunity for the victim’s testimony to be rebutted was by Applicant. He testified that the victim drove the car to Houston (directly contradicting her assertion that she had been kidnapped), that they stopped in multiple populated areas where the victim could have alerted someone if she was in trouble, and that the victim packed for the trip (directly contradicting her assertion that the fact she had a hairbrush, clothes, and a toothbrush was merely coincidental). Applicant has not met his burden of proof to show a reasonable probability that he would have been found incompetent if there had been an incompetency trial. As a result, Applicant’s ineffective-assistance-of-counsel claim must fail.
In reaching our conclusion, we have not ignored Dr. Scarano’s opinion that it is common for individuals with severe mental illness to appear lucid for portions of proceedings, yet be incompetent during other portions of the proceeding. See Drope v. Missouri, 420 U.S. 162, 181, 95 S.Ct. 896, 43 L.Ed.2d 103 (1975) (“Even when a defendant is competent at the commencement of his trial, a trial court must always be alert to circumstances suggesting a change that would render the accused unable to meet the standards of competence to stand trial.”). Nevertheless, neither ha-beas counsel nor Applicant’s experts have provided specific examples of Applicant’s behavior sufficient to meet Applicant’s burden of proof that he failed to understand the proceedings or that he had an inability to rationally communicate with his counsel. To prevail in a claim of ineffective assistance of counsel, there must be some affirmative showing that the person lacked “sufficient present ability to consult with the person’s lawyer with a reasonable degree of rational understanding” or “a rational as well as factual understanding of the proceedings against the person.” Tex. Code Crim. Proc. art. 46B.003(a). If there is no affirmative evidence of either prong, then the applicant’s argument must fail because there is an insufficient quantum of evidence to satisfy the Strickland threshold.
III. CONCLUSION
We hold that trial counsel’s decision to not investigate Applicant’s mental-health history was unreasonable and constituted deficient performance, but Applicant has not demonstrated prejudice because he has not shown that there is a reasonable probability that, but for counsel’s deficiency, he would have been found incompetent at an incompetency trial. We do not reach the third question filed and set for our review — the proper remedy if prejudice had been found — because Applicant cannot show that he was prejudiced.
KELLER, P.J., filed a concurring opinion in which MEYERS, J., joined.
MEYERS, J., concurred in the result.
filed a concurring opinion in which MEYERS, J., joined.
The Court finds that counsel was deficient for failing to adequately investigate whether applicant was competent to stand trial, but then it finds that there was no prejudice because there is no reasonable probability that applicant would have been found incompetent. So even though counsel was correct in her assessment that applicant was competent to stand trial, the Court finds her performance to be deficient. I cannot agree with that holding.
First of all, the Court seems to believe that a client’s mental illness creates a duty for counsel to investigate his competence to stand trial. But mental illness, in and of itself, does not raise an issue of incom*58petency,1 so it is unclear why it would create a duty to investigate. None of the cases cited by the court for the proposition that counsel must investigate a client’s mental history are on point. In those cases, the evidence showed a reasonable probability that the defendant was in fact incompetent,2 or the court concluded that counsel did not act deficiently with respect to the investigation into competency,3 or the defendants’ mental histories were relevant to possible defenses to the charged crimes or as mitigating evidence at punishment.4
With respect to this last distinguishing circumstance, it is important to note that there is a difference between matters involving a defendant’s past mental state and matters involving his present mental state. A defendant’s past mental state may be relevant to sanity, to guilt for the charged offense, or as mitigating evidence, but his past mental state is not particularly relevant to his competency to stand trial. At one time or another, Texas courts have held that evidence of the following types does not raise the issue of competency to stand trial: a history of mental illness,5 past psychiatric problems,6 paranoia and generalized anxiety disorder,7 drug addiction and suicide attempt,8 suicidal tendencies and depression,9 a history of psychiatric treatment,10 and a diagnosis of schizophrenia.11 Competency to stand trial involves only present mental state. Counsel will not have firsthand knowledge of a defendant’s past mental state, and information about his past mental state will typically be obtained through investigation. But counsel will have firsthand knowledge of a defendant’s present mental state and investigation into his past mental state will typically be beside the point.
The Ninth Circuit recently addressed a claim of ineffective assistance of counsel with respect to the issue of competency to stand trial.12 That court did not address the deficient-performance prong of the Strickland!13 test,14 but its comments on the *59prejudice prong are telling. The court pointed out that “defense counsel, who spent a great deal of time discussing the issues with Deere, had no doubt that Deere was legally competent, rational and could cooperate in his defense if he wanted to.”15 This assessment was made despite the fact that the defendant had “severe personality and substance abuse disorders.” 16 The Ninth Circuit concluded that counsel was uniquely positioned to assess whether the defendant was competent:
Although’s Deere’s psychiatric diagnosis is a medical question, his competence to plead guilty is a legal one that judges and lawyers deal with all the time. Deere and Mr. Jones [defense counsel] conferred for countless hours before the plea was entered. It was apparent to Mr. Jones that Deere understood the proceedings and his various options but wanted to plead guilty for the reasons already stated: he wanted to spare his family; he wanted to minimize the trauma to the survivors; and he thought a guilty plea and possible death sentence was just under the circumstances. These are not irrational considerations. Mr. Jones was uniquely positioned to assess Deere’s ability to understand the proceedings and his legal options. Thus, Mr. Jones’s opinion is “especially relevant” and provides “significant evidence” that Deere was competent.17
Several other courts have declined to address the deficient-performance prong and held that the defendant did not suffer prejudice because there was not a reasonable probability that the defendant would have been found incompetent.18
The Supreme Court of Florida has held that defense attorneys were not deficient for failing to move for a competency determination based in part on their own personal observations of the defendant.19 In that case, Nelson (the defendant) claimed that a suicide attempt and the opinion of a defense mental-health expert that Nelson was marginally competent placed trial counsel on notice that Nelson’s competency to proceed was at issue.20 The court explained that “trial counsel were experienced in handling capital cases and deemed Nelson competent to proceed based on [an expert’s] evaluation and through their own contacts with Nelson.”21 The attorneys indicated that, “based on face-to-face dealings with Nelson, it was never deemed necessary to move for a competency determination.”22 The court determined that Nelson had “not demonstrated deficiency of his trial counsel.”23
*60Second, the Court refers to competence to stand trial as “a medical issue.” It is not. Mental illness is a medical issue, and it is undisputed that appellant suffered to some degree from mental illness. Competence to stand trial is a legal issue.24 As such, counsel is particularly suited to assess whether her client “lacks the present ability to consult with” her with a reasonable degree of rational understanding and whether he has “a rational as well as factual understanding of the proceedings against him.” The lawyer, not the doctor, is the “expert witness” with regard to her client’s competency.
Third, the Court finds that the record lacks affirmative evidence of either prong of the test for competency to stand trial. If, even after remands for affidavits from family and experts, there is no evidence that appellant was incompetent to stand trial, I do not understand how the Court can conclude that counsel was deficient for believing exactly that.
Tens of thousands of defendants suffer from mental illness, and the severity of their mental illnesses varies widely. When a defendant is perfectly able to communicate with his attorney and understand the proceedings against him, I would not find his attorney’s failure to investigate mental illness to be deficient conduct. In this case, the trial court found that appellant was such a defendant, and those findings are fully supported by the record.
I agree with the Court’s discussion of prejudice in the present case and would not have written separately if the Court had chosen to address only the issue of prejudice and found that there was none.25 But I disagree with the Court’s decision to label counsel’s conduct deficient when she was correct in her assessment, based upon her own observations, that applicant was competent to stand trial.
With these comments, I join only parts I and IIB of the Court’s opinion.