CARLEY, Justice.

A jury found Brian Keith Terrell guilty of malice murder and ten counts of first-degree forgery. For the murder, the jury recommended a death sentence, finding the following statutory aggravating circumstances: the offense of murder was committed while the defendant was engaged in the commission of an aggravated battery; and the offense of murder was outrageously or wantonly vile, horrible or inhuman in that it involved depravity of mind and an aggravated battery to the victim before death. OCGA § 17-10-30 (b) (2), (7). Terrell's motion for new trial was denied and he appeals.

Jury Selection

1. During voir dire, prospective juror Smith stated that he was a full-time military policeman with the Georgia National Guard, with arrest power. Terrell moved to excuse juror Smith for cause, but the trial court denied the motion stating, "I think he can distinguish the difference between civil and military law." It is well-settled that full-time police officers with arrest powers must be excused if challenged for cause, because it "is inherent in the nature of police duties and the closeness with which such officers are identified with criminal procedures that questions regarding possible bias, fairness, prejudice or impermissible influence upon jury deliberations inevitably arise." Hutcheson v. State, 246 Ga. 13 (1) ( 268 S.E.2d 643) (1980). See also Harris v. State, 255 Ga. 464 (2) ( 339 S.E.2d 712) (1986). The record clearly shows that juror Smith was a full-time military policeman with arrest power and that he did not meet any of the exceptions to this automatic disqualification rule. Thus, the trial court's erroneous refusal to excuse this juror for cause requires reversal of the convictions. Hutcheson v. State, supra. Compare Mosher v. State, 268 Ga. 555 (2) ( 491 S.E.2d 348) (1997) (law enforcement firearms instructor without arrest power not subject to automatic disqualification); Denison v. State, 258 Ga. 690 (4) ( 373 S.E.2d 503) (1988) (part-time police officers not subject to automatic excusal for cause); Cargill v. State, 255 Ga. 616 (6) ( 340 S.E.2d 891) (1986) (active-duty drill sergeant who had served as military policeman and would serve as a military policeman again upon completion of drill sergeant duty not subject to automatic disqualification); Wilson v. State, 250 Ga. 630 (4) (a) ( 300 S.E.2d 640) (1983) (reserve police officers not subject to automatic excusal). Because our reversal of the convictions will result in a new trial, we will now examine those enumerations raising issues likely to recur on retrial.

The Guilt-Innocence Phase of Trial

2. The evidence presented at trial authorized the jury to find the following: Barbara Terrell, the defendant's mother, had been assisting the victim, seventy-year-old John Watson, with meals and errands since 1989. Watson had a number of health problems and required dialysis three times a week. Barbara Terrell received no compensation for her services, but Watson had promised to include her in his will, and they had discussed marriage. On May 1, 1992, Terrell was released from prison on parole. Watson met Terrell through his mother and Terrell was inside his home on several occasions.

On Saturday, June 20, 1992, Watson called the sheriff's office and reported receiving ten canceled checks, totaling about $8,700, which had been stolen and forged. Some of the checks were made payable to Terrell and the others had been made payable to a former school friend of Terrell, who police later determined was not involved in the forgeries. Due to his feelings for Terrell's mother, Watson asked the sheriff to wait a few days before taking an arrest warrant for Terrell. He told Ms. Terrell to tell her son he would not take a warrant if he returned most of the money by Monday, June 22. Watson relayed this information to her son who promised to repay the money. However, the next day, June 21, Terrell, who had recently bought a car and new clothes despite not having a job, told his mother that he could not repay the money.

John Watson's body was found on his property at approximately noon on June 22. He had been shot four times and severely beaten in the face and head. The medical examiner testified that either the gunshots or the beating would have been fatal, and that the victim was still alive when receiving all these injuries. Shell casings found on Watson's driveway indicated that the firearm used in the murder was a .38 or .357 caliber revolver. Watson had apparently been shot in his driveway as he was getting into his car to drive to his morning dialysis appointment and then dragged into the brush and beaten.

Jermaine Johnson, Terrell's cousin, confessed to his role in the crime and testified at trial in exchange for a five-year sentence for robbery. He stated that he and Terrell checked into a motel near Watson's house at midnight on June 21. Terrell locked the keys in his blue Cadillac and, despite the assistance of a sheriff's deputy, they were unsuccessful at unlocking the car door. He said that he and Terrell went to bed and awoke at 6:30 a.m. on June 22. They broke a window to get into the Cadillac. Terrell had a .357 or .38 caliber revolver and he asked to be dropped off at Watson's house. Terrell told Johnson to return for him at 9:00 a.m. Johnson went back to the motel, slept until 8:30 a.m., and then drove back to pick up Terrell. Before 9 a.m., he had a conversation with the motel manager in the parking lot as he was leaving. The manager noticed that the broken glass in the parking lot was on the side of the car opposite the broken window, indicating that the Cadillac had been moved since the window was broken. The man with whom she spoke matched Johnson's description and she testified that he was alone.

Johnson drove back and forth on the road in front of Watson's house, stopping at a Wal-mart and a convenience store to wait. Witnesses saw Johnson driving Terrell's blue Cadillac at this time. Johnson testified that Terrell appeared near Watson's house and he stopped and picked him up. Watson's neighbor testified that at approximately 9:30 a.m., she saw a man wearing a white shirt standing next to a large blue car parked on the side of the road. Terrell was wearing a white shirt on June 22. Terrell told Johnson that he had shot a man. Terrell bought new clothes at a department store and took a bath at his grandmother's house while Johnson washed the car. Later, Terrell took his son to the zoo.

When questioned by the police, Terrell admitted committing the forgeries, but denied the murder. He said that he and Johnson had checked into the motel with a woman, who was never identified, and stayed there all night after he had locked his keys in the car. He said that they did not leave until 10:00 or 10:30 a.m., when they broke the window to get into the Cadillac. Later in the interview, a police officer asked him how the woman got home and Terrell stated that Johnson drove her home early that morning, which would have been impossible if the keys were locked in the car at that time. When Terrell realized that he had contradicted himself, he refused to answer any more questions.

The evidence was sufficient to enable a rational trier of fact to find proof of Terrell's guilt of malice murder and ten counts of first-degree forgery beyond a reasonable doubt. Jackson v. Virginia, 443 U.S. 307 ( 99 S.Ct. 2781, 61 L.E.2d 560) (1979). The evidence was also sufficient to authorize the jury to find beyond a reasonable doubt the statutory aggravating circumstances which supported his death sentence for the murder. Jackson v. Virginia, supra; OCGA § 17-10-35 (c) (2).

3. Contrary to Terrell's contention, we hold that the evidence corroborating Jermaine Johnson's testimony was sufficient to support his murder conviction. OCGA § 24-4-8. The corroborating evidence need not be sufficient by itself to convict Terrell, nor does the testimony of an accomplice need to be corroborated in every detail. See Riley v. State, 268 Ga. 640 (1) ( 491 S.E.2d 802) (1997); Myers v. State, 260 Ga. 412 (3) ( 395 S.E.2d 811) (1990); Castell v. State, 250 Ga. 776 (1) (c) ( 301 S.E.2d 234) (1983). "`Slight evidence from an extraneous source identifying the accused as a participator in the criminal act will be sufficient corroboration of the accomplice to support a verdict. [cits.]'" Myers, supra. Johnson's testimony was corroborated by evidence that Terrell had a motive to kill the victim in order to prevent the taking of an arrest warrant which would violate his parole conditions, that Terrell checked into a motel near the victim's house the night before the murder, that Terrell was wearing a white shirt on June 22 and a man in a white shirt was seen near the victim's house at the time of the murder, that two witnesses saw Johnson driving Terrell's car near the victim's house around the time of the murder, and that Terrell lied to the police about when the car window had been broken. See Myers, supra. ; Pye v. State, 269 Ga. 779 (5) ( 505 S.E.2d 4) (1998). The sufficiency of the corroborating evidence is a matter for the jury, and the evidence was legally sufficient for the jury to convict. Edmond v. State, 267 Ga. 285 (2) ( 476 S.E.2d 731) (1996); Jackson v. Virginia, supra.

4. Terrell's complaint about the jury charge on corroboration of accomplice testimony is without merit. The record shows that the charge given was virtually identical to the charge on accomplice testimony corroboration contained in the pattern jury instructions. Edmond, supra at (3); Council of Superior Court Judges of Georgia, Suggested Pattern Jury Instructions, Vol. II, pp. 52-53 (1991).

5. During a colloquy, Terrell's counsel announced that he intended to argue in closing that the State had something to hide. When asked what he meant by the State having something to hide, defense counsel responded that the State did not do its job in this case. The trial court replied that the defense could argue that the State did not do its job, but that there was no evidence to support an argument of deliberate misconduct by the prosecution. Terrell was permitted to and did argue that the State did not do an adequate investigation in the case, that others had motives to kill the victim, and that State witnesses were not truthful and may have committed perjury. Terrell now asserts that the trial court improperly limited his closing argument. However, there was no evidence that the State was hiding something, and the trial court has discretion to determine the range of proper closing argument. Morgan v. State, 267 Ga. 203 (1) ( 476 S.E.2d 747) (1996). After review of the record, we cannot conclude that the trial court abused its discretion. See Morgan v. State, supra.; Manning v. State, 207 Ga. App. 181 (4) ( 427 S.E.2d 521) (1993) (trial court did not abuse its discretion by preventing defendant from arguing that the State intentionally delayed his trial in order to cause witness memory lapses, when there was no evidence to support such a claim).

6. GBI agent Troy Pierce interviewed Terrell on June 22 and on June 24, 1992. Agent Pierce took handwritten notes during each interview, dictated the notes onto an audiotape, and had his secretary transcribe the notes. As was his standard practice, Agent Pierce checked the transcription against the original handwritten notes for accuracy, and then discarded the original notes. Terrell claims that the destruction of the original notes amounted to the destruction of evidence in violation of his due process rights and Brady v. Maryland, 373 U.S. 83 ( 83 S.Ct. 1194, 10 L.E.2d 215) (1963). There was no error. Assuming that the original notes were evidence, the record does not show that they were material or that Agent Pierce acted in bad faith. See Arizona v. Youngblood, 488 U.S. 51 ( 109 S.Ct. 333, 102 L.E.2d 281) (1988); Walker v. State, 264 Ga. 676 (3) ( 449 S.E.2d 845) (1994).

7. Terrell complains that the State improperly introduced evidence of his character in the guilt-innocence phase. OCGA § 24-2-2. To show motive for the murder, the trial court permitted the State to present evidence that Terrell was on parole at the time of the murder and that the taking of an arrest warrant for the forgeries would have resulted in his immediate incarceration for violating his parole conditions. The State did not present evidence in the guilt-innocence phase about the nature of his prior conviction. We find no error. "While motive is not an essential element in the proof of the crime of murder, the State is entitled to present evidence to show that there was a motive." Johnson v. State, 260 Ga. 457 (2) ( 396 S.E.2d 888) (1990). Evidence that the victim's taking of an arrest warrant would have immediately returned Terrell to jail was relevant to prove that Terrell had a motive to kill the victim, and relevant evidence is not rendered inadmissible simply because it incidently puts the defendant's character in issue. Cook v. State, 221 Ga. App. 831 (3) ( 472 S.E.2d 686) (1996) (evidence that defendant was on parole relevant and admissible to show his motive for robbery).

8. Terrell's arrest was not illegal. The trial court correctly found that he was arrested pursuant to an outstanding warrant for terroristic threats or acts. OCGA § 17-4-20.

9. The record does not support Terrell's claim of bias on the part of the trial judge.

The Sentencing Phase of Trial

10. Terrell argues that the trial court erred by refusing to admit relevant mitigating evidence in the sentencing phase. In an attempt to cause the jury to have "residual doubt," he sought to introduce evidence that he offered to plead guilty to the forgeries in exchange for consecutive sentences totaling 100 years, but that he refused to plead guilty to murder. While the permissible scope of mitigation evidence is wide, Barnes v. State, 269 Ga. 345 (27) ( 496 S.E.2d 674) (1998), the trial court correctly refused to admit this evidence. For policy reasons, evidence of a defendant's conditional offer to plead guilty is not admissible in the sentencing phase. Mobley v. State, 265 Ga. 292 (18) ( 455 S.E.2d 61) (1995).

11. "The trial court did not err in failing to instruct the jury that a unanimous finding on mitigating circumstances is not required, while charging the jury that its sentencing verdict had to be unanimous, since the court charged the jury that it was not necessary for the jury to find any mitigating circumstances to impose a life sentence." McClain v. State, 267 Ga. 378 (6) ( 477 S.E.2d 814) (1996). It was also not error for the trial court to refuse to instruct the jury on residual doubt. The trial court is not required to identify specific mitigating circumstances in its charge. Jenkins v. State, 269 Ga. 282 (25) ( 498 S.E.2d 502) (1998).

12. Evidence that Terrell set a fire in his jail cell while awaiting trial was properly admitted as a non-statutory aggravating circumstance. See Hicks v. State, 256 Ga. 715 (19) ( 352 S.E.2d 762) (1987) (a defendant's character and his conduct while in prison are relevant to sentence). The State provided sufficient pretrial notice of its intention to present evidence about this incident in accordance with OCGA § 17-10-2.

13. We need not address the remaining enumerations of error because they are not likely to recur on retrial. Since the evidence supports the jury's finding of the statutory aggravating circumstances, on retrial the State may again seek the death penalty. Childress v. State, 266 Ga. 425 (6) ( 467 S.E.2d 865) (1996); Moore v. State, 263 Ga. 11 (9) ( 427 S.E.2d 766) (1993).

Judgments reversed. All the Justices concur, except Benham, C. J., who concurs in Divisions 1, 2, 3, 4, 5, 6, 7, 8, 9, 12, and 13 and in the judgment, and Hunstein, J., who dissents.