delivered the opinion of the court:
Defendant, William Metcalfe, appeals his convictions for attempted armed robbery and attempted aggravated robbery and his sentence of 10 years in prison. On appeal, defendant argues that: (1) the circuit court erred by denying his motion to quash arrest and suppress evidence; (2) the State failed to prove him guilty beyond a reasonable doubt; (3) defendant was denied his right to a fair trial where one of the jurors indicated during voir dire that she was unable to be fair and impartial; (4) the circuit court erred by failing to properly instruct *1011the jury; and (5) the circuit court erred by denying defendant’s requests for appointment of counsel to represent him on his posttrial motions and at sentencing. We reverse and remand for a new trial.
At trial, Jerry Dudek testified that at about 3:30 p.m. on January 8, 1998, he was using an automatic teller machine (ATM) in the Citibank branch located at 222 West Adams when defendant approached him and asked for money. Mr. Dudek said “no.” Defendant again asked for money. Mr. Dudek again declined. Defendant then brushed up against Mr. Dudek, stuck his left hand in his pocket, and said “I have got a gun. I want your money.” Mr. Dudek begged defendant not to hurt him. Defendant responded by bumping Mr. Dudek and stating, “I want your f — ing money.”
Mr. Dudek screamed for help. Defendant took a step back, then reached for Mr. Dudek’s wallet, which was on a ledge underneath the ATM. Mr. Dudek grabbed defendant’s left arm and prevented him from taking the wallet. Defendant then walked to a revolving door and attempted to exit the bank. Mr. Dudek put his foot against the door and trapped defendant inside.
Several bank employees, including an armed security guard, reached the scene. Mr. Dudek told them that defendant had tried to rob him. One of the bank employees ran outside through another door and held the revolving door from that side, preventing defendant from escaping. Mr. Dudek left for a work-related appointment and later spoke with Officer Halloran and signed a complaint against defendant.
Officer Halloran testified that at about 3:40 p.m. on January 8, 1998, he received a call of a robbery in progress at the Citibank at 222 West Adams. Upon arriving at the scene, Officer Halloran observed two people (including Mr. Dudek) detaining defendant in the bank’s revolving door. Officer Halloran also observed that defendant’s left hand was in his left coat pocket.
Some of the people at the scene yelled that defendant had a gun. Officer Halloran asked defendant to take his hand out of his pocket. Defendant complied and exited the revolving door. Officer Halloran then handcuffed him and conducted a pat-down search. Officer Hallo-ran found a sharpened meat cleaver in defendant’s left coat pocket.
Defendant testified that at about 3:40 p.m. on January 8, 1998, he approached Mr. Dudek at the ATM machine inside the Citibank and asked him for some change. Mr. Dudek did not respond. Defendant again asked for money. Mr. Dudek grabbed defendant by the arm and yelled for security. Defendant then attempted to leave the bank through the revolving door, but Mr. Dudek held onto the door and prevented him from leaving.
A security guard rushed over with his gun drawn. Defendant told *1012the guard that he had done nothing wrong. The police arrived shortly thereafter, and defendant explained to them that there had been a misunderstanding and that Mr. Dudek appeared to have been drunk.
The officers handcuffed defendant, patted him down, and placed him under arrest. As the officers were putting defendant into the squad car, they frisked him again and discovered a meat cleaver in his back pocket. Defendant explained that he used the meat cleaver to scrape ice off windshields and to open pop cans.
The jury found defendant guilty of attempted armed robbery and attempted aggravated robbery. The circuit court merged the attempted aggravated robbery conviction into the attempted robbery conviction and sentenced defendant to 10 years in prison. Defendant filed this timely appeal.
First, defendant argues that the circuit court erred by denying his pretrial motion to quash arrest and, suppress evidence based on lack of probable cause. Probable cause to arrest exists where the facts and circumstances known to the police officer at the time of the arrest are sufficient to warrant a person of reasonable caution to believe that an offense had been committed and that the offense was committed by the person arrested. People v. Sims, 192 Ill. 2d 592, 614 (2000). The existence of probable cause is determined by the totality of the circumstances at the time of the arrest. Sims, 192 Ill. 2d at 615. A determination of probable cause is governed by commonsense, practical considerations and not by technical legal rules. Sims, 192 Ill. 2d at 615. Since both parties here accept the testimony of the arresting police officer, our standard of review is de novo. Sims, 192 Ill. 2d at 615.
Officer Halloran testified at the hearing on the motion to suppress that when he arrived at the scene, he observed defendant being “detained” in the revolving doors by a security guard and Mr. Dudek. Several bank employees were screaming that defendant had a gun, and both Mr. Dudek and the security guard told Officer Halloran that defendant had tried to rob Mr. Dudek. The security guard also told Officer Halloran that defendant claimed to have a gun in his pocket.
Defendant argues that probable cause was lacking because Officer Halloran did not have a “first-hand” statement from the victim, Mr. Dudek, as to defendant’s criminal behavior. Defendant’s argument is not well-taken because (as discussed above) Officer Halloran testified that Mr. Dudek made a statement at the scene that defendant had attempted to rob him.
Defendant also argues that probable cause was lacking because Officer Halloran failed to inquire into the veracity and reliability of the security guard and the bank employees and otherwise failed to corroborate their statements as to defendant’s attempt to rob Mr. *1013Dudek. In effect, defendant argues that Officer Halloran should have conducted a mini-trial at the bank, cross-examining the witnesses until defendant’s guilt was proven beyond a reasonable doubt. However, the evidence relied upon by the arresting officers does not have to be sufficient to prove defendant’s guilt beyond a reasonable doubt (Sims, 192 Ill. 2d at 615); rather, as discussed above, the totality of the circumstances must be such as to warrant a person of reasonable caution to believe that defendant committed an offense. Here, Officer Halloran was confronted with an identified victim and defendant, statements from bank employees as to defendant’s possession of a gun, and a statement from both the victim and the bank security guard that defendant had tried to rob Mr. Dudek. Under the totality of these circumstances, Officer Halloran had probable cause to arrest defendant, as a person of reasonable caution could believe that defendant had attempted to commit armed robbery.
Defendant argues that Illinois v. Gates, 462 U.S. 213, 76 L. Ed. 2d 527, 103 S. Ct. 2317 (1983), and Recznik v. City of Lorain, 393 U.S. 166, 21 L. Ed. 2d 317, 89 S. Ct. 342 (1968), compel a different result. In Gates, the United States Supreme Court held that an informant’s veracity is a relevant consideration in the totality of the circumstances analysis guiding probable cause determinations. Gates, 462 U.S. at 230-34, 76 L. Ed. 2d at 543-45, 103 S. Ct. at 2328-30. In Recznik, the United States Supreme Court held that statements from unknown “people on the street” concerning defendant’s alleged criminal activity was not sufficient to establish probable cause. Recznik, 393 U.S. at 169, 21 L. Ed. 2d at 321, 89 S. Ct. at 344-45.
Neither Gates nor Recznik compels a result different from the one reached here, where Officer Halloran’s information regarding defendant’s criminal activity came, not from unknown people on the street, but from an identified victim and the bank security guard, and where defendant concedes that Officer Halloran had no reason to doubt the credibility of defendant’s accusers.
Next, defendant argues that the State failed to prove him guilty beyond a reasonable doubt. When presented with a challenge to the sufficiency of the evidence, the relevant question is whether, after viewing the evidence in the light most favorable to the prosecution, any rational trier of fact could have found the essential elements of the crime beyond a reasonable doubt. People v. Smith, 321 Ill. App. 3d 669, 673 (2001).
The jury convicted defendant of attempted armed robbery. A person commits an attempt when, “with intent to commit a specific offense, he does any act which constitutes a substantial step toward the commission of that offense.” 720 ILCS 5/8 — 4(a) (West 1996). A *1014person commits armed robbery when he commits robbery (taking property from another by the use of force or by threatening the imminent use of force (720 ILCS 5/18 — 1(a) (West 1996)) while carrying on or about his person, or otherwise being armed with, a dangerous weapon. 720 ILCS 5/18 — 2(a) (West 1996)).
Here, Mr. Dudek testified that defendant demanded his money, bumped him, told him he was carrying a gun, and attempted to grab his wallet. Officer Halloran testified that defendant possessed a sharpened meat cleaver on his person. Viewing the evidence in the light most favorable to the State, any rational trier of fact could find that defendant took a substantial step toward robbing Mr. Dudek while carrying a dangerous weapon on his person. Accordingly, the State proved defendant guilty of armed robbery beyond a reasonable doubt.
Defendant argues that his conviction should be reversed because he never “physically manifested” the dangerous weapon (the meat cleaver) during the commission of the crime. In People v. Addison, 236 Ill. App. 3d 650 (1992), the First District Appellate Court rejected the argument that the weapon must be displayed during the commission of an armed robbery. The court reasoned that the “plain language of the Criminal Code [of 1961 (Ill. Rev. Stat. 1985, ch. 38, par. 18 — 2)] states that an armed robbery occurs when a person carries or possesses a dangerous weapon during a robbery. The statute does not require that the dangerous weapon be displayed or used.” Addison, 236 Ill. App. 3d at 655. We follow the well-reasoned opinion in Addison and hold that defendant was not required to display or use his dangerous weapon to sustain his conviction for attempted armed robbery.
Next, defendant argues that he was denied his right to a fair trial where one of the jurors indicated during voir dire that she was unable to be fair and impartial. Defendant waived review by failing to object at trial. People v. Enoch, 122 Ill. 2d 176, 186 (1988). However, because the issue affects the constitutional right to a fair trial, we consider defendant’s contention under the plain error exception to the waiver rule. See 134 Ill. 2d R. 615(a); People v. Wilson, 303 Ill. App. 3d 1035, 1041 (1999).
The federal (U.S. Const, amends. VI, XIV) and state (Ill. Const. 1970, art. I, § 8) constitutions guarantee a criminal defendant the right to trial by an impartial jury. This right is so basic that a violation thereof requires reversal. People v. Stone, 61 Ill. App. 3d 654, 666-67 (1978). An impartial jury is “ ‘one made up of persons prepared to exercise their personal judgment, favoring neither prosecution nor accused, standing indifferent to both, and guided only by law and the *1015evidence in the performance of their duties.’ ” Stone, 61 Ill. App. 3d at 667, quoting People v. Hobbs, 35 Ill. 2d 263, 270 (1966). Impartiality must be ascertained from the statements made by the prospective jurors. Stone, 61 Ill. App. 3d at 667.
The pertinent voir dire examination of the juror is as follows:
“Q. And you have not been an accused, complainant or witness in a criminal case?
A. I have not been an accused. I have been a victim.
Q. That case go to trial?
A. I was robbed at gunpoint from my father’s business.
Q. That’s where you have been victim of a crime?
A. Yes.
Q. You also have a family member or close friend who was victim of a crime?
A. My mother and father.
Q. The fact that you have been a victim and your mother and father have been victims, would that affect your ability to be fair and impartial in this case?
A. I hope not.
Q. You believe you could listen to the evidence and make a determination from the evidence on the witness stand?
A. Yes.
* * *
Q. Would anything affect your ability to be fair and impartial?
A. I would hope not.
Q. As I stated, you will listen to the evidence and make your determination based on what you hear from the witness stand?
A. Yes.
Q. Did you understand the concept of proof beyond a reasonable doubt and presumption of innocence?
A. Yes.
* * *
Q. And if at the end of all of the evidence, you felt that the State had proven its case beyond a reasonable doubt, would you have any problem signing a guilty verdict?
A. No.
Q. If on the other hand, you felt they had not, would you have any problems signing a not guilty verdict?
A. No.
* *
Q. *** [TJhe case where you were a witness was someone caught? Was that case prosecuted?
A. I was witness and victim. I positively identified him. He got off because of a technicality.
*1016* *
q *** [Y]ou said something about the person that you had identified or the person getting off on a technicality. Does the result of that case in any way bias you as you would sit on this jury?
A. I would — I mean I would have to answer yes.
Q. Which way is that?
A. I believe that the legal system, you know, when he was clearly guilty from all the evidence but based on the way that the system is, it was based on the fact that he tried to discredit me as a witness based on how many feet and inches I was away from him when I identified him or how far away I was from the gun. I felt that they gave — I felt like I was the victim in the crime. I’m sorry. He felt like he was the victim and I was the criminal.
Q. Would that affect your ability to be fair here?
A. Yes. You ever had something like that to happen to you, it’s hard not to feel that way.”
The State argues that it was not error to seat the juror, as she stated that she understood the concept of proof beyond a reasonable doubt and the presumption of innocence, and she further stated that she would listen to the evidence and make her determination based thereon. The State’s argument is not well-taken, as the juror subsequently clarified that her experience with the criminal justice system had biased her and affected her ability to be fair toward defendant. The juror’s explicit expressions of self-doubt concerning her ability to be impartial necessitate a reversal and remand for new trial. See, e.g., Stone, 61 Ill. App. 3d at 667 (reversing and remanding for a new trial where several veniremen expressed self-doubt concerning their ability to be impartial).
The State argues that People v. Wilson, 303 Ill. App. 3d 1035 (1999), compels a different result. In Wilson, the appellate court found no error during voir dire where the trial court seated a juror who had stated that his relationships with several police officers and an attorney for the Fraternal Order of Police (FOP) would affect his ability to be fair and impartial. Wilson, 303 Ill. App. 3d at 1039, 1041-43. Wilson is inapposite, as the juror was never asked nor did he explain how or why his relationships with the police and the FOP attorney would affect his ability to be fair and impartial, nor did he otherwise indicate any bias against defendant specifically. By contrast, the juror here gave a detailed explanation as to the underlying reasons for her bias, i.e., that she had been the victim of an earlier crime but that the perpetrator “got off” because “the system” allowed the perpetrator to “discredit” her. The juror stated that this experience with “the system” affected her ability to be fair. The juror’s statements clearly *1017show a marked prejudice against defendant; accordingly, we reverse and remand for a new trial.
The State also cites People v. Bowman, 325 Ill. App. 3d 411 (2001). In Bowman, the prospective juror stated during voir dire that her mother and two sisters had been raped. The juror answered “probably” when asked whether the rapes of her mother and sisters would cause her to be unfair to defendant (who was charged with aggravated criminal sexual assault). Bowman, 325 Ill. App. 3d at 417. Defense counsel did not ask that the juror be excused for cause based upon these answers, nor did counsel use a peremptory strike to remove the juror from the panel. The circuit court seated the juror, and defendant was ultimately convicted. On appeal, defendant argued that the trial court should have sua sponte excused the juror or asked her more questions to rehabilitate her. Bowman, 325 Ill. App. 3d at 425. The appellate court disagreed, stating:
“We have found no case that holds, under circumstances similar to these, the trial court has a sua sponte duty to ask a prospective juror more questions. Still, its failure to do so is troubling. Had defense counsel asked for further inquiry, and had the request been turned down, we would have a far different case.” Bowman, 325 Ill. App. 3d at 425.
The appellate court held that defendant waived review of the issue by accepting the juror “without complaint.” Bowman, 325 Ill. App. 3d at 426. The appellate court further held that, even if the issue had not been waived, defendant failed to show that the juror was partial where the trial court specifically posed questions about fairness, impartiality, and willingness to follow the law and the juror did not “respond negatively” thereto. Bowman, 325 Ill. App. 3d at 426.
The purpose of voir dire is to assure the selection of an impartial panel of jurors free from bias or prejudice. People v. Williams, 164 Ill. 2d 1, 16 (1994). The primary responsibility for initiating and conducting the voir dire examination lies with the trial judge, not with the attorneys. Williams, 164 Ill. 2d at 16. Our supreme court has stated that it is the “trial judge [who] is obliged to insure that, in fact, the defendant receives a trial before a fair and impartial jury.” (Emphasis added.) People v. Taylor, 101 Ill. 2d 377, 387 (1984). A trial judge defeats the purpose of voir dire and fails to ensure that the defendant receives a trial before a fair and impartial jury when he seats a juror who expresses bias or prejudice and who has not been rehabilitated by further questioning. We hold that when a prospective juror indicates bias or prejudice and has not been rehabilitated and counsel fails to exercise a peremptory challenge or challenge her for cause, the trial judge has a sua sponte duty to excuse the prospective juror.
*1018The State argues that, as in Bowman, the juror was rehabilitated here when the court questioned her about her ability to be fair and impartial. We disagree. In Bowman, the trial judge posed questions about fairness, impartiality, and willingness to follow the law and asked the juror to respond negatively by raising her hand. She did not do so. Bowman, 325 Ill. App. 3d at 426. By contrast, the juror here equivocated when asked whether she could be fair and impartial:
“Q. The fact that you have been a victim and your mother and father have been victims, would that affect your ability to be fair and impartial in this case?
A. I hope not.
* *
Q. Would anything affect your ability to be fair and impartial?
A. I would hope not.”
As discussed above, the juror subsequently explained that her experience with the criminal justice system had biased her and affected her ability to be fair toward defendant. Thus, unlike Bowman, the juror was not rehabilitated.
The State next cites the following cautionary statement made by the Bowman court:
“It would be a bad idea to allow defendants to accept a questionable juror, proceed to trial, then, when things turn out badly, claim entitlement to reversal because that juror voted to convict.
By not giving the court the opportunity to prevent or correct errors at trial, a lawyer would gain the advantage of obtaining a reversal through an intentional failure to act, in effect, a free trial.” Bowman, 325 Ill. App. 3d at 426.
This analysis presupposes that the trial judge must accept a biased juror who has not been challenged by counsel. As discussed, though, the trial judge (not counsel) bears the responsibility of ensuring that defendant receives a fair trial; thus, when a prospective juror indicates bias or prejudice and has not been rehabilitated and counsel fails to exercise a peremptory challenge or challenge her for cause, the trial judge has the sua sponte duty to excuse the prospective juror. By exercising this duty, the trial judge negates any intentional failure to act on the part of counsel and ensures that the defendant receives a fair trial by an impartial jury.
Our holding is not meant as a criticism of the juror, nor should she think that she committed any error here; to the contrary, she should be commended for responding truthfully during voir dire when asked about her ability to be fair and impartial.
Our determination earlier in this order that the evidence was sufficient to establish defendant’s guilt beyond a reasonable doubt is not *1019binding on retrial. Rather, our consideration of the sufficiency of the evidence removes the risk that defendant would be subject to double jeopardy. People v. Taylor, 76 Ill. 2d 289, 309-10 (1979).
For the foregoing reasons, we reverse and remand for a new trial. As a result of our disposition of this case, we need not address defendant’s other allegations of error.
Reversed and remanded.