Where defendant is charged with murder in the perpetration of robbery, MCL 750.316; MSA 28.548, and where the only evidence linking defendant to the crime is defendant’s ex*426tra-judicial confession that he was, at most, an accomplice, and not a direct participant, is it necessary for the prosecution to prove the corpus delicti of aiding and abetting independent of defendant’s extra-judicial confession? The trial court answered this question of first impression in Michigan in the negative and denied defendant’s motion to suppress the confession. Following trial by jury, defendant was found guilty and appeals of right.
Joe Swetay was last seen alive when he closed his store tavern late at night May 1, 1971. It was his custom to put all receipts from the store tavern in a money bag which he would take home with him upon closing. He was found dead the next morning lying face down in the bedroom fully clothed, lights and TV on, blood spewed about the room. His wallet lay on the bedroom chair, its contents, sans cash, strewn nearby. His left rear trouser pocket had been cut off, and his body was punctured in many places. The dresser drawers were open with articles lying half in and half out; and none of the day’s receipts or the money bag, nor any money at all found in the house. The safe in the bedroom had not been opened. Three people rolled the safe out of the house where it was taken to a locksmith who opened it. It did not contain the last day’s receipts, but did contain between $27,000 and $28,000. One of decedent’s sons testified that his father had the habit of carrying large sums of money in his wallet in his back trouser pocket.
Some five years later, on May 18, 1976, while defendant was being investigated by a grand jury in connection with criminal activity not related to the death of Joe Swetay, defendant made a series of statements implicating himself in the Swetay *427homicide.1 In these statements, all given after defendant was given full Miranda 2 warnings, defendant stated that one Wayne Wilson offered him $10 to drive Wilson and a friend, "Nutty”, to Swetay’s home to rob it; that defendant accepted the offer and acted as a lookout while Wilson and "Nutty” committed the robbery, picking up "Nutty” and meeting at Wilson’s home after the robbery. A tape of defendant’s statement made June 1, 1976, was admitted into evidence. Prior to trial, defendant moved to suppress the statements and quash proceedings on grounds that the statements were involuntary.
In January, 1977, defendant was charged with murder during the perpetration of a robbery or attempted robbery, and following preliminary examination in February, 1977, was bound over to circuit court on the offense charged.
Following a Walker3 hearing in September 1977, the motion to suppress was denied. Trial by jury commenced October 4, and continued through October 20, 1977. After deliberating one and one-half hours, defendant was found guilty of aiding and abetting a robbery felony murder and, on December 27, 1977, was sentenced to a term of mandatory life.
Based upon the long established rule that the corpus delicti must first be established before admissions or confessions of the accused may be put in evidence, People v Swetland, 77 Mich 53, 63; 43 *428NW 779 (1889), People v Allen, 390 Mich 383; 212 NW2d 21 (1973), defendant argues that, except for his confession as set forth in the several statements described earlier, the prosecution failed to independently prove: (a) a robbery had occurred, or (b) aiding and abetting. Ergo, contends defendant, the state failed to independently prove the corpus delicti. As to assertion (a), defendant is correct on the law but is wrong on the facts.
At both the preliminary examination and trial, sufficient evidence was produced to establish the corpus delicti of robbery, an essential element of the offense charged. All of the facts surrounding the discovery of the deceased’s body indicate a robbery. Deceased’s empty wallet, normally carried in his rear trouser pocket, was found without cash, its other contents strewn about the room. The day’s receipts from the deceased’s business and the bag used by deceased to carry the receipts home were missing. The deceased’s trouser pocket in which he carried the wallet had been slashed away. Dresser drawers in the bedroom were open, with their contents strewn about, and, though deceased had a gun and a knife, neither were ever found. The only evidence contradicting robbery was the unopened safe which had been left in deceased’s home. But this evidence was contradicted by the fact that the safe was bulky and heavy and difficult to open even if one knew the combination. Based upon these undisputed facts, we find that independently of the accused’s statements armed robbery was established.
The question posed in defendant’s assertion (b) is more difficult to resolve and is of first impression. In order to convict a person as an aider and abettor, is it necessary to establish the corpus delicti of aiding and abetting sans the confession? *429Citing Judge (now Justice) Levin’s dissenting opinion in People v Allen, 39 Mich App 483, 496; 197 NW2d 874 (1972), adopted in full by the Supreme Court in People v Allen, 390 Mich 383; 212 NW2d 21 (1973), defendant argues that both the principal crime of robbery-murder and the separate and distinct crime of aiding and abetting must be established by proof independent of defendant’s confession. Specifically, defendant relies on that portion of the opinion stating that all the essential elements of the offense -must be established apart from the confession:
"[T]he law in this state is clear that the corpus delicti of an offense is not established until the people have introduced evidence from which the trier of fact may reasonably find that acts constituting all the essential elements of the offense have been committed and that someone’s criminality was responsible for the commission of those acts.” (Emphasis in the original.)
First, in Allen, defendant was convicted of felony murder during the perpetration of a robbery. Unlike the situation in the instant case, there was no evidence of the underlying felony (robbery) apart from the confession. Thus, strictly construed, Allen holds no more than that where the defendant is charged with robbery-murder, the underlying felony of robbery must be established apart from the defendant’s confession.
Second, the significant difference in the penalty for conviction of first-degree or second-degree murder constituted a sound basis for Justice Levin’s decision that the distinguishing element between them, viz: premeditation or a killing in the course of committing certain named felonies, be established by evidence apart from the confession. But, in the case before us, there is no difference in *430penalty between the crime of robbery and the offense of aiding and abetting a robbery. Under MCL 767.39; MSA 28.979, every person concerned in the commission of a felony is equally guilty whether he directly commits the offense or aids or abets in its commission.
Third, the policy behind the corpus delicti rule is to insure that the crime has occurred. As Justice Levin noted, since confessions are sometimes obtained under circumstances that make them suspect, "evidence, other than the defendant’s statements, that the charged offense has been committed by someone — not necessarily the defendant” is required. Allen, supra, 505. Because there is no likelihood that a felony murder has not been committed by someone in the instant case, it is not necessary to establish defendant’s aiding and abetting by independent evidence. It is sufficient that the corpus delicti of the principal crime, viz: a killing during the course of a robbery, was established by independent evidence.4 Though defendant contends that one may not be found guilty as an aider or abettor unless there is proof that he intended to rob or kill or knew that his fellow participants so intended, one becomes an aider and abettor criminally responsible for the acts of his principals when he knows that the actual perpetrators had the required intent to lie in wait and rob the victim. People v Wirth, 87 Mich App 41, 46-47; 273 NW2d 104 (1978).
Defendant contends that the trial court erred when, following the Walker hearing, it found defendant’s several extra-judicial statements voluntary. This Court in People v Hummel, 19 Mich App 266, 270; 172 NW2d 550 (1969), described the *431standard of review of Walker hearings as the "clearly erroneous test”. The Hummel Court further explained the standard of review by stating that this Court would give deference to the trial court’s findings, especially where the demeanor of the witnesses is important, as where credibility is a major factor. In the present case, the trial judge had a superior opportunity to judge the credibility of the witnesses at the Walker hearing, and thus deference should be given to his finding that the witnesses for the prosecution were more credible than the defense witnesses.
Although there were several questioning sessions, there was no evidence that defendant at any point absolutely refused to talk with Officer Reeves or anyone else, and he was read his Miranda rights prior to each questioning session. Furthermore, no physical threats were made to defendant, and defendant suffered no physical harm except perhaps some hunger on one occasion. Generally, defendant was offered food and he did accept it. Defendant’s medical problems were mild and he made no complaints about them prior to June 1, 1976. The trial judge, at the close of the Walker hearing, made detailed findings and concluded that defendant’s statements were voluntary. This Court concludes that the trial judge’s findings were not clearly erroneous.
Nineteen photographs were, offered in evidence and 18 were admitted. Defendant argues that all 18 should have been excluded because they shed no light on any disputed issue and served only to prejudice the jury.5 In particular, objection is made to photographic exhibits 8, 10, 11 and 14. We disagree. To begin with, the exhibits were not *432color photographs but were black and white. Thus, the bloodstains were hardly inflammatory. Further, the exhibits were helpful — in fact necessary —to establish the corpus delicti of robbery-murder which, as we have noted earlier, could not be established by the accused’s confessions. Exhibit 11 does not depict the victim’s body, but shows a severed telephone cord and chair; exhibit 8 shows the pulled-out filing cabinet drawers and articles strewn about; exhibit 10 focuses on the severed rear trouser pocket; exhibit 14 is an enlargement of exhibit 8. In our opinion, the photographs were more probative than prejudicial. Accordingly, we fault neither the trial court for ruling them admissible, nor defense counsel for failing to object to their admission.
Defendant’s remaining contentions of error are found without merit.6
Affirmed.