BLACKWELL, Justice.

Darius Ellis was tried by a Fulton County jury and convicted of the murder and attempted armed robbery of Marvel Stripling, as well as possession of a firearm during the commission of a felony. Ellis appeals, contending that the evidence is insufficient to sustain his convictions, that the trial court improperly limited his voir dire of prospective jurors, that the trial court improperly commented on the credibility of a witness, and that he was denied the effective assistance of counsel. Having reviewed the briefs and record, we find no reversible error, and we affirm.1

1. Viewed in the light most favorable to the verdict, the evidence shows that Stripling drove to Atlanta on July 21, 2008 to purchase marijuana, bringing with him a large amount of cash. After arriving in Atlanta, Stripling called on his friend, Shaya Muhammad, who had suggested to Stripling that Atlanta was a good market in which to buy marijuana. Muhammad enlisted Ellis, his neighbor, to assist Stripling, and Stripling, Muhammad, and Ellis set out in a car in search of marijuana. Their search eventually took them to a nearby residence, where Ellis entered the home, retrieved a marijuana sample, and eventually brought the sample outside for Stripling to inspect. While Ellis was inside the home, his identical twin brother, Demetrius, appeared at the residence and also entered the home. The sample that Ellis retrieved from the home apparently was acceptable to Stripling, and Stripling, Muhammad, and Ellis returned to the street on which Muhammad and Ellis lived, where the three men waited in their car for a marijuana dealer to arrive.

About 20 minutes later, a man arrived with a garbage bag and went into the home in which Ellis lived. Stripling wanted to remain outside, but Ellis insisted that Stripling complete the marijuana transaction inside his home. At first, Ellis went into his home alone, but he later returned outside and called for Stripling, and Stripling reluctantly agreed to accompany Ellis into the home. Muhammad followed. Inside, the man who had arrived earlier with a garbage bag pulled out a handgun, and another individual appeared with a bandana over his face, also carrying a gun. Stripling struggled with the gunmen, and in the course of that struggle, he was shot twice in the leg. The massive blood loss occasioned by these gunshot wounds eventually caused his death. Around the time he was shot, some of the money that Stripling had been carrying, as well as some of his jewelry, went missing.

While Stripling was struggling with the gunmen, Muhammad and Ellis fled from the residence. Later, Demetrius and another man were seen exiting and fleeing from the home, both carrying guns. When Ellis met with a detective to discuss the incident, he admitted that he had set up Stripling for an armed robbery. Ellis denied, however, that he knew that anyone would be shot in the course of the robbery, and he added that he was not willing to go to jail for Demetrius.

Ellis contends that the evidence merely shows his presence at the scene of the crimes, which would not be enough, of course, to warrant a conviction. See Brown v. State, 291 Ga. 887, 888(1), 734 S.E.2d 41 (2012). In support of this contention, Ellis notes that Muhammad testified at trial that Ellis appeared to be shocked by the events that unfolded inside his home and that Ellis fled before any shots were fired. And about his incriminating statements to the detective, Ellis claims that the testimony of the detective about these statements was weak and ambiguous. As we have explained before, however, it is for the jury, not appellate judges, to assess the credibility of witnesses, to weigh the evidence, and to resolve conflicts in the evidence. Williams v. State, 287 Ga. 199, 200, 695 S.E.2d 246 (2010). When we consider whether the evidence is sufficient to sustain a conviction, we must view the evidence in the light most favorable to the verdict, and we inquire only whether a jury reasonably could find beyond a reasonable doubt from that evidence that the defendant is guilty of the crimes of which he was convicted. Cutrer v. State, 287 Ga. 272, 274, 695 S.E.2d 597 (2010).

The evidence in this case was sufficient to authorize the jury to find that Ellis, Demetrius, and the other gunman were engaged in a common enterprise that involved Ellis luring Stripling into his home for the purpose of an armed robbery. "[W]hether a person was a party to a crime can be inferred from his presence, companionship, and conduct before and after the crime was committed." Teasley v. State, 288 Ga. 468, 469, 704 S.E.2d 800 (2011) (citations omitted). See also Copeny v. State, 316 Ga.App. 347, 349(1)(a), 729 S.E.2d 487 (2012). Here, the evidence showed that Ellis undertook to guide Stripling in his search for marijuana, that Ellis took Stripling to a residence at which Demetrius appeared, that Ellis and Demetrius were inside the residence for a period of time, that Ellis exited the residence and directed Stripling to return to the street on which Ellis lived, that Ellis waited with Stripling until the gunman with a garbage bag arrived, that Ellis followed the gunman inside his home, that Ellis subsequently called Stripling into his home, and that Ellis insisted that the marijuana transaction be completed inside his home. Moreover, Ellis and Demetrius are brothers, and as we have said before, "where ... the crimes involve relatives, slight circumstances can support the inference that the parties colluded." Teasley, 288 Ga. at 469, 704 S.E.2d 800 (citation and punctuation omitted).

From this evidence, as well as the incriminating statements that the detective attributed to Ellis, the jury properly might have found that Ellis was not merely present at the scene of the crimes, but was a party to them. See Parks v. State, 272 Ga. 353, 354, 529 S.E.2d 127 (2000). Cf. Moore v. State, 255 Ga. 519, 521(1), 340 S.E.2d 888 (1986) (evidence was insufficient where it was only circumstantial and showed merely that defendant had motive to kill victim, was present at scene of crime, and fled from scene). Even if Ellis "did not have the specific intent that [Stripling] be killed, the crimes which he did intend were dangerous ones; by their attendant circumstances, they created a foreseeable risk of death." Parks, 272 Ga. at 354, 529 S.E.2d 127 (citation omitted). Accordingly, we conclude that the evidence was sufficient to authorize a rational trier of fact to find beyond a reasonable doubt that Ellis was a party to the crimes of which he was convicted and for which he was sentenced, namely, felony murder in the commission of an aggravated assault, attempted armed robbery, and possession of a firearm during the commission of a felony. Jackson v. Virginia, 443 U.S. 307, 319(III)(B), 99 S.Ct. 2781, 61 L.Ed.2d 560 (1979). See also Teasley, 288 Ga. at 470, 704 S.E.2d 800; Hill v. State, 281 Ga. 795, 797(1)(a), 642 S.E.2d 64 (2007); Parks, 272 Ga. at 354, 529 S.E.2d 127; Walsh v. State, 269 Ga. 427, 430(1), 499 S.E.2d 332 (1998).

2. We next consider the contention that the trial court improperly limited the voir dire of prospective jurors. Voir dire began with general questions put to the venire as a whole, and during this portion of the voir dire, Ellis asked whether any jurors had strong feelings about individuals involved in the sale of illegal drugs. Many jurors responded affirmatively to this question, and so, when Ellis was given the opportunity to question the prospective jurors individually, he asked a juror who had indicated that she had such strong feelings whether she could put those feelings aside if "mention of this is brought up in trial." The prosecuting attorney objected that this question would require the juror to prejudge the case, and the trial court sustained the objection.2 By doing so, Ellis contends, the trial court improperly limited his examination of the prospective jurors.

As we recently observed, "[a] fair trial before an impartial factfinder is a fundamental component of due process of law," and "voir dire is the engine of selecting a jury that will be fair and impartial." Ellington v. State, ___ Ga. ___ (7)(b), 735 S.E.2d 736 (2012) (citations omitted). Consequently, Georgia law provides for voir dire examination that may be relatively broad in scope:

OCGA § 15-12-133. Nevertheless, the scope of voir dire is not unlimited, and generally speaking, prejudgment questions — questions that require a prospective juror to assume facts that are yet to be proved and to prejudge the case based on those assumed facts — are inappropriate. See Bryant v. State, 288 Ga. 876, 880(4)(a), 708 S.E.2d 362 (2011) ("Questions ... that call for prejudgment are improper in a voir dire examination.") (citation omitted). We have acknowledged, however, that "there is often a fine line between asking potential jurors how they would decide the case and questions that merely seek to expose bias or prejudice." Sallie v. State, 276 Ga. 506, 510(3), 578 S.E.2d 444 (2003). Accordingly, "[t]he scope of voir dire and the propriety of particular questions are left to the sound discretion of the trial court." Howard v. State, 286 Ga. 222, 229(5), 686 S.E.2d 764 (2009) (citation omitted). We need not decide in this case, however, whether the trial court abused its discretion when it sustained the objection about which Ellis complains.

Even assuming that Ellis was entitled to ask the prospective jurors whether they could put aside strong feelings about sellers of illegal drugs if "mention of this is brought up in trial," we conclude that any error in sustaining an objection to that question was harmless. See Cherry v. State, 230 Ga.App. 443, 444(1), 496 S.E.2d 764 (1998). This is not a case in which the trial court foreclosed all inquiry concerning the subject matter to which the question was directed. Cf. Ellington, ___ Ga. at ___(7)(d), 735 S.E.2d 736 (trial court foreclosed "any inquiry into whether jurors might be biased in a case involving child victims"). To the contrary, Ellis was permitted to question the venire as a whole to identify prospective jurors who had strong feelings about individuals involved in the sale of illegal drugs, and even after the trial court sustained the objection at issue here, Ellis was permitted to rephrase his inquiry and to ask a prospective juror individually whether she could make a decision based on the law and evidence, "no matter what your feelings are for or against anything else that might be mentioned." See Chancey v. State, 256 Ga. 415, 424(3)(a), 349 S.E.2d 717 (1986); Walker v. State, 214 Ga.App. 777, 779(3), 449 S.E.2d 322 (1994). Consequently, any error in sustaining the objection at issue was harmless, and we find no reversible error in the way that the trial court limited the voir dire examination of the prospective jurors. See Chancey, 256 Ga. at 424(3)(a), 349 S.E.2d 717.

3. We turn now to the claim that the trial court improperly commented on the credibility of a witness in the presence of the jury. As we noted earlier, a detective testified at trial that Ellis admitted that he set up Stripling for an armed robbery. On cross-examination, Ellis asked the detective about his testimony at a pretrial hearing, specifically about his failure to testify at that hearing about Ellis having set up an armed robbery. In response, the prosecuting attorney sought to admit a document as a prior consistent statement by the detective. Ellis objected, and during the colloquy that followed, the trial judge said, "I think it is admissible as a prior consistent." Ellis contends that this statement was an improper comment on the evidence.

According to OCGA § 17-8-57, "[i]t is error for any judge in any criminal case, during its progress or in his charge to the jury, to express or intimate his opinion as to what has or has not been proved or as to the guilt of the accused."3 We have explained before, however, that this rule "does not generally extend to colloquies between the judge and counsel regarding the admissibility of evidence. Furthermore, we have previously determined that remarks of a judge assigning a reason for his ruling are neither an expression of opinion nor a comment on the evidence." Butler v. State, 290 Ga. 412, 416(4), 721 S.E.2d 876 (2012) (citations and punctuation omitted). See also Boyd v. State, 286 Ga. 166, 168(3), 686 S.E.2d 109 (2009). In this case, the statement at issue was made by the trial judge in the context of a colloquy concerning an evidentiary objection and the ruling of the court on that objection. Accordingly, the statement did not amount to an expression of an opinion of the proof or the guilt of the accused. See Brown v. State, 242 Ga.App. 347, 348-349(2), 529 S.E.2d 650 (2000) (where trial judge commented "in the presence of the jury that [a witness] had made a prior consistent statement," and the "comment was made in the context of a ruling on Brown's objection to the introduction of the [witness's] earlier statement to investigators," OCGA § 17-8-57 was not violated).4 Moreover, the trial court cautioned the jury explicitly at the close of the trial that "[b]y no ruling or comment that the Court has made during the progress of this case has the Court intended to express any opinion upon the facts of the case, upon the credibility of the witnesses, upon the evidence, or upon the guilt or innocence of the defendant." See id. at 349(2), 529 S.E.2d 650; see also Butler, 290 Ga. at 416(4), 721 S.E.2d 876; Creed v. State, 255 Ga.App. 425, 428(1), 565 S.E.2d 480 (2002). In these circumstances, we see no violation of OCGA § 17-8-57.

4. Last, we turn to the contention that Ellis was denied the effective assistance of counsel at trial. To prevail on a claim of ineffective assistance, Ellis must prove both that the performance of his lawyers was deficient and that he was prejudiced by this deficient performance. Strickland v. Washington, 466 U.S. 668, 687(III), 104 S.Ct. 2052, 80 L.Ed.2d 674 (1984). To show that the performance of his lawyers was deficient, Ellis must prove that they performed their duties at trial in an objectively unreasonable way, considering all the circumstances, and in the light of prevailing professional norms. See id. at 687-688(III)(A), 104 S.Ct. 2052. See also Kimmelman v. Morrison, 477 U.S. 365, 381(II)(C), 106 S.Ct. 2574, 91 L.Ed.2d 305 (1986). And to show that he was prejudiced by the performance of his lawyers, Ellis must show "a reasonable probability that, but for counsel's unprofessional errors, the result of the proceedings would have been different. A reasonable probability is a probability sufficient to undermine confidence in the outcome." Strickland, 466 U.S. at 694(III)(B), 104 S.Ct. 2052. See also Williams v. Taylor, 529 U.S. 362, 391(III), 120 S.Ct. 1495, 146 L.Ed.2d 389 (2000). This burden, though not impossible to carry, is a heavy one. See Kimmelman, 477 U.S. at 382(II)(C), 106 S.Ct. 2574. We conclude that Ellis has failed to carry his burden.

(a) Ellis claims that his trial lawyers were ineffective because they failed to object to the limitation of voir dire discussed in Division 2 above. But as we already have concluded, Ellis nevertheless was able to adequately explore any inclination or bias that might have derived from strong feelings that prospective jurors had about individuals involved in the sale of illegal drugs. See Div. 2, supra. Moreover, Ellis failed to present any evidence at the hearing on his motion for new trial to show that the disallowed voir dire question would have made it "apparent that [any juror] had a fixed and definite opinion regarding the issue of guilt or could not decide the case based on the evidence and instructions, and that the trial court would have abused its discretion by failing to strike them for cause." Cade v. State, 289 Ga. 805, 809(4), 716 S.E.2d 196 (2011). For these reasons, Ellis has failed to show that the failure of his lawyers to challenge the limitation of voir dire occasioned by the trial court sustaining a single objection to a specific question caused him any prejudice.

(b) Ellis asserts that his lawyers were ineffective because they failed to move to strike three prospective jurors for cause, all of whom had said that they had strong feelings about individuals involved in the sale of illegal drugs. When asked about her ability to decide the case based on the evidence and charge of the court, the first of these jurors initially answered "[p]ossibly," and when questioned further by the trial judge, she said that she "would try."5 In response to similar questions, the second of these jurors said that "I hope I can," and she indicated that she did not think that she would be unable to follow the law. The third of these jurors answered "probably so" and "I would think so." As we understand it, Ellis complains that none of these responses were unequivocal and that adequate grounds existed, therefore, to challenge the jurors for cause.

But "[a] prospective juror's doubt as to his or her own impartiality does not demand as a matter of law that he or she be excused for cause." Cade, 289 Ga. at 807(3), 716 S.E.2d 196 (citations omitted). For instance, "[w]hen a potential juror testifies that he or she will `try' to decide the case based upon the court's instructions and the evidence, excusing that prospective juror for cause is not mandated." Johnson v. State, 291 Ga. 621, 624(2), 732 S.E.2d 266 (2012) (citations omitted). See also Griffiths v. State, 283 Ga.App. 176, 180(2), 641 S.E.2d 169 (2006) (court not required to strike juror who held certain ingrained opinions about drug dealing); Brown v. State, 243 Ga.App. 632, 632-633(1), 534 S.E.2d 98 (2000) (court not required to strike juror who expressed strong feelings about illegal drugs and illegal drug use). Furthermore, the transcript of voir dire does not reveal that any of the three prospective jurors at issue had a fixed and definite opinion as to the question of guilt or innocence. Cade, 289 Ga. at 808(4), 716 S.E.2d 196. And "a decision on juror bias lies within the sound discretion of the trial court and is based on the court's evaluation of a potential juror's demeanor and credibility." Hardnett v. State, 285 Ga. 470, 475(7), 678 S.E.2d 323 (2009). For these reasons, Ellis has failed to show that a motion to strike any of these prospective jurors for cause likely would have been successful, and he has, therefore, failed to show that his lawyers performed deficiently when they failed to move to strike or that he was prejudiced as a result.6 See id.; Cade, 289 Ga. at 808(4), 716 S.E.2d 196.

(c) Ellis claims that his lawyers were ineffective because they failed to move to strike for cause another prospective juror. Ellis notes that this prospective juror previously had been employed as an FBI agent, assigned for nine years to a bank robbery squad, and that he was the victim in a pending armed robbery prosecution for which the district attorney prosecuting Ellis was responsible. A prospective juror must be excused for cause if he is employed as "a full-time police officer with arrest powers." Robinson v. State, 278 Ga. 836, 838(4), 607 S.E.2d 559 (2005) (footnote omitted). That rule does not require a trial court, however, to strike for cause a former law enforcement officer, such as the prospective juror at issue here, who had left the employ of the FBI about 30 years before the trial of this case. Rickman v. State, 277 Ga. 277, 280(3), 587 S.E.2d 596 (2003). This prospective juror said that he could still be a fair and impartial juror, notwithstanding his law enforcement background, and that background, therefore, afforded no basis to move to excuse him for cause.

About the pending armed robbery prosecution, there is no evidence that the prospective juror had any contacts concerning that prosecution with any person employed by the district attorney. And "[w]e have been reluctant to extend the automatic disqualification rules for jurors beyond the statutorily prohibited relationships and, in criminal cases, full-time law enforcement officers and employees of the prosecutor's office." Moore v. Moore, 281 Ga. 81, 84(4), 635 S.E.2d 107 (2006) (citations omitted) (citing a case in which a prospective juror represented by law firm of the solicitor-general was not automatically disqualified). As for the juror's experience as a victim of an armed robbery, he never indicated in voir dire that this experience would make it difficult for him to be fair and impartial, and nothing in the transcript shows that he had a fixed and definite opinion about guilt or that he could not decide the case based on the evidence and charge. See Garrett v. State, 280 Ga. 30, 31(2), 622 S.E.2d 323 (2005). See also Pearce v. State, 300 Ga.App. 777, 780-781(2), 686 S.E.2d 392 (2009) (victim of child molestation not disqualified from service as juror in case involving child molestation). In these circumstances, we cannot say that a motion to strike this prospective juror likely would have been successful, and for that reason, Ellis has failed to show that his lawyers performed deficiently when they failed to make such a motion or that Ellis was prejudiced as a result. See Cade, 289 Ga. at 808(4), 716 S.E.2d 196; Hardnett, 285 Ga. at 475(7), 678 S.E.2d 323; Rickman, 277 Ga. at 280(3), 587 S.E.2d 596.

(d) Ellis contends that his lawyers were ineffective because they failed to move to strike for cause yet another prospective juror, one who admitted to a "little" bias based on his opinion that defendants are "[g]enerally" guilty, and who said that, although "every case is individual, ... you get that in your head." But "a prospective juror's expression of such a belief does not necessarily require disqualification from service." Bishop v. State, 268 Ga. 286, 289(5), 486 S.E.2d 887 (1997). See also Wilson v. State, 271 Ga. 811, 815(5)(a), 525 S.E.2d 339 (1999) (court was not obligated to strike a juror who initially expressed belief that 99.9 percent of criminal defendants are guilty), overruled on other grounds, O'Kelley v. State, 284 Ga. 758, 768(3), 670 S.E.2d 388 (2008); Roberts v. State, 276 Ga. 258, 259(2), 577 S.E.2d 580 (2003). The juror here acknowledged that every case is unique, and in response to additional questioning, he said that he was impartial as to this case and would do his best to base his decision on the evidence and on the court's instructions and to hold the State to its burden. On a motion to strike for cause, the trial court would not have been compelled to rely on the juror's "initial expression of a potentially disqualifying belief, rather than [his] subsequent qualifying answers." Bishop, 268 Ga. at 289(5), 486 S.E.2d 887. See also Wilson, 271 Ga. at 815(5)(a), 525 S.E.2d 339. Yet again, therefore, Ellis has not shown that an effort to strike this prospective juror would have been successful, and he has failed to carry his burden under Strickland to prove deficient performance that caused actual prejudice.7 See Cade, 289 Ga. at 808(4), 716 S.E.2d 196; Hardnett, 285 Ga. at 475(7), 678 S.E.2d 323.

(e) Finally, Ellis claims that his lawyers were ineffective because they failed to object when the prosecuting attorney referred in the presence of the jury to his pretrial motion to suppress his alleged inculpatory statements. The prosecuting attorney elicited testimony from a detective that the detective previously had testified under oath in this case on November 19, 2009. On cross-examination, Ellis asked the detective several times about his prior testimony, using the transcript of the motion hearing on that date. On redirect, the prosecutor asked whether the earlier hearing involved a motion to suppress statements made by Ellis, and the detective answered in the affirmative. Citing Chumley v. State, 282 Ga. 855, 857-858(2), 655 S.E.2d 813 (2008), Ellis now argues that this testimony erroneously signaled to the jury that the trial court had approved the admission of the statements as voluntary.

Ellis did not raise this claim, however, before or during the hearing on his motion for new trial, and, although one of his lawyers testified at that hearing, Ellis did not question her with respect to this issue. As to deficient performance, the first element of ineffective assistance, the United States Supreme Court has explained that we "must indulge a strong presumption that counsel's conduct falls within the wide range of reasonable professional assistance; that is, the defendant must overcome the presumption that, under the circumstances, the challenged action might be considered sound trial strategy." Strickland, 466 U.S. at 689(III)(A), 104 S.Ct. 2052 (citation and punctuation omitted). And where, as here, "trial counsel does not testify at the motion for new trial hearing about the subject, it is extremely difficult to overcome this presumption." Higginbotham v. State, 287 Ga. 187, 190-191(5)(a), 695 S.E.2d 210 (2010) (citation and punctuation omitted). During the cross-examination of the detective at trial, Ellis's lawyer specifically relied on the motion hearing transcript, and the prosecutor did not refer to the ruling of the trial court on the motion to suppress, nor did he indicate that the court had found that Ellis made the statements voluntarily. A reasonable lawyer might have concluded that an objection would be unlikely to succeed and would only serve to draw attention to the reference to the motion to suppress. After reviewing the trial transcript, we conclude that "[c]ounsel's choice not to object may have been a strategic decision, and because [Ellis] did not question trial counsel concerning this decision, [he] has failed to carry [his] burden to demonstrate that trial counsel provided deficient performance." Smith v. State, 288 Ga. 348, 352-353(8)(d), 703 S.E.2d 629 (2010) (citation and punctuation omitted).

Moreover, Chumley is distinguishable because it involved an explicit statement by the trial judge to the jury that the defendant "`clearly understood and knew' he was waiving his constitutional rights and that he had given his statement `freely and willingly.'" Chumley, 282 Ga. at 858(2), 655 S.E.2d 813. In this case, the trial court made no expression of such an opinion, and the prosecutor did not refer to either the fact or substance of the ruling of the court on the motion to suppress. See Boyd, 286 Ga. at 168(3), 686 S.E.2d 109; Medlock v. State, 263 Ga. 246, 250(4), 430 S.E.2d 754 (1993). Accordingly, Ellis has failed to show any reasonable probability that the outcome of the trial would have been different if his lawyers had objected to the reference to the motion to suppress, as the reference did not amount to reversible error. See Medlock, 263 Ga. at 250(4), 430 S.E.2d 754.

Judgments affirmed.

All the Justices concur.