BLACKWELL, Justice.

Paul Johnson was tried by a Fulton County jury and convicted of murder and other crimes, all in connection with the killing of Craig Porter. Johnson appeals, contending that the evidence is insufficient to sustain his convictions, that the trial court erred when it admitted certain testimony from the medical examiner, that the trial court erred when it admitted evidence of a photographic lineup that, Johnson says, was unduly suggestive, and that he was denied the effective assistance of counsel. Upon our review of the record and briefs, we find no error, and we affirm.1

1. Viewed in the light most favorable to the verdict, the evidence shows that around 3:30 on the morning of April 2, 2004, Porter and his girlfriend, Tiana Smith, left their home in Jonesboro and went to the parking lot of a nearby gas station to purchase crack cocaine. They already had been to this same parking lot to purchase drugs earlier, but they had been sold fake drugs. Having spent all their money, Porter and Smith intended to "pull off with somebody's crack" without paying for it.

The couple encountered Brent Johnson near the gas station parking lot and asked him if he knew where they could purchase "dope."2 Brent got into their car and directed them to the Columbia Hills Apartments in Atlanta. When they arrived, Brent went to an apartment on the first floor of "Building H," and Smith saw Johnson emerge from the apartment with a gun tucked into his pants. Johnson approached the passenger side of the couple's car, engaged them in a brief conversation, and ultimately handed Smith a package containing crack cocaine. Porter attempted to speed off in the car, but as he drove away, Johnson began shooting at him. Porter was killed by a bullet that struck him in the back of the head, and he sustained a second gunshot wound to his back between his shoulder blades. Smith was able to steer the car out of the apartment complex, she hailed an oncoming car, and she was rescued by the driver of that car.

In the aftermath of the shooting, Johnson argued with Brent about the incident before returning to his apartment. Police officers arrived shortly thereafter, and they discovered Porter's body in the car just outside the apartment complex. There were several bullet holes in the rear window of the car and bullet fragments therein. Later that morning, officers discovered numerous shell casings outside "Building H." The investigation ultimately focused on the apartment on the first floor of that building that was frequented by Johnson, Erick Owens, Cavaras Clark, and Kevin Reese. Police found cocaine and marijuana in the apartment, and Owens admitted that he and Johnson used the apartment to sell drugs. Owens reported that Johnson admitted to having "unloaded" his gun on some people who tried to "ride out with some drugs," and Owens directed the police to Brent, whom he described as the "junkie" who brought the couple to the apartment complex and observed the shooting. When police officers located Brent, he provided them with details of the shooting and its aftermath that corroborated the stories provided by Smith and Owens, and Smith identified Johnson as the shooter in a photographic lineup.

Johnson contends that the evidence is legally insufficient to prove beyond a reasonable doubt that he is guilty of the crimes of which he was convicted. In support of this contention, Johnson points to the lack of physical evidence connecting him to the crime, the inconsistent and unreliable nature of the eyewitness testimony, a discrepancy in the testimony of the lead detective, and the existence of other suspects who could have committed the crime. But the State was not required to produce any physical evidence, as "the testimony of a single witness is generally sufficient to establish a fact, [and t]he lack of corroboration [with physical evidence] only goes to the weight of the evidence and the credibility of the testifying witness, which is solely within the purview of the jury." Manuel v. State, 289 Ga. 383, 385(1), 711 S.E.2d 676 (2011) (citations omitted). And although there were multiple inconsistencies in the testimony presented by the State, "[a]s long as there is some competent evidence, even though contradicted, to support each fact necessary to make out the State's case, we must uphold the jury's verdict." Rankin v. State, 278 Ga. 704, 606 S.E.2d 269 (2004) (citation omitted). Viewing all the evidence in the light most favorable to the verdict, we conclude that it was sufficient to authorize a rational trier of fact to find beyond a reasonable doubt that Johnson was guilty of the crimes of which he was convicted. Jackson v. Virginia, 443 U.S. 307, 319(III)(B), 99 S.Ct. 2781, 61 L.Ed.2d 560 (1979). See also Simmons v. State, 291 Ga. 705, 706(1), 733 S.E.2d 280 (2012).

2. Johnson claims that the trial court erred when it allowed the medical examiner to provide her opinion about matters outside her offered area of expertise. When asked at trial to explain the absence of bullet fragments in the (non-fatal) wound between Porter's shoulder blades, the medical examiner testified that she believed the bullet "created an entrance wound but did not have enough energy to penetrate his body and instead rebounded outside his body." Johnson asserts that this testimony clearly went beyond the medical examiner's expertise, see Johnson v. Knebel, 267 Ga. 853, 857-858(3), 485 S.E.2d 451 (1997), but we disagree. The medical examiner demonstrated that she was experienced in dealing with certain ballistics issues related to, among other things, range of fire, soot, stippling, and the trajectory of a bullet through a body. The trial court did not abuse its discretion when it allowed her to share her opinion of why the autopsy did not reveal any bullet fragments in the wound between Porter's shoulder blades. See Williams v. State, 279 Ga. 731, 732(2), 620 S.E.2d 816 (2005); Nassar v. State, 253 Ga. 35(3), 315 S.E.2d 903 (1984).3

3. Johnson also asserts that the trial court erred when it admitted evidence of the photographic lineup in which Smith identified Johnson as the assailant. Johnson claims that the lineup was unduly suggestive, and his claim on that issue was the subject of a motion to suppress and a pretrial hearing. We know that the trial court considered and rejected Johnson's claim that the lineup was unduly suggestive, but we do not know what evidence was considered by the trial court because Johnson has failed to include a copy of the transcript of the pretrial hearing in the record. Nor did Johnson move to supplement the record after the State pointed out the absence of that transcript. It is the burden of the appellant to ensure that the record is complete, and "[w]hen this is not done, there is nothing for the appellate court to review." Howe v. State, 250 Ga. 811, 813(2), 301 S.E.2d 280 (1983) (citation omitted). There is no evidence in the record to suggest that the photographic lineup was unduly suggestive, and the issues that Johnson raises that are contained in the record (such as the length of time that passed between the murder and the lineup, the failure of the lineup to include photographs of Clark and Reese, and Smith's ability to identify the perpetrator when she had been abusing drugs on the evening that the crimes took place) are not factors to be considered when determining if a lineup was unduly suggestive, but rather are factors to be considered in evaluating the likelihood of misidentification.4 See Gibson v. State, 283 Ga. 377, 378-379(2), 659 S.E.2d 372 (2008). And where an identification procedure is not unduly suggestive, it is not necessary for a trial court presented with a motion to suppress to consider whether there was a substantial likelihood of irreparable misidentification. Williams v. State, 286 Ga. 884, 888(4)(b), 692 S.E.2d 374 (2010). As a result, the trial court did not err when it denied Johnson's motion to suppress Smith's pretrial identification of his photograph, and it was for the jury to decide what weight to give that identification. See Williams v. State, 290 Ga. 533, 536-537(2)(a), 722 S.E.2d 847 (2012).5

4. Finally, Johnson contends that his trial lawyer was ineffective because he failed to object to two portions of the prosecutor's closing argument. To prevail on a claim of ineffective assistance, Johnson must prove both that the performance of his lawyer 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 prove that the performance of his lawyer was deficient, Johnson must show that the lawyer performed his duties at trial in an objectively unreasonable way, considering all the circumstances, and in the light of prevailing professional norms. 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 prove that he was prejudiced by the performance of his lawyer, Johnson must show "a reasonable probability that, but for counsel's unprofessional errors, the result of the proceeding 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 is a heavy one, see Kimmelman, 477 U.S. at 382(II)(C), 106 S.Ct. 2574, and Johnson falls far short of carrying it.

First, Johnson claims that his trial lawyer should have objected when the prosecutor said:

Johnson asserts that this argument amounted to improper bolstering of a witness, but it is not improper for counsel to urge the jury to find that a witness was truthful based upon the evidence. See Rouse v. State, 275 Ga. 605, 607(6), 571 S.E.2d 353 (2002). Here, the prosecutor did not provide her personal opinion about the lead detective's veracity, but rather "submit[ted]" to the jury that it should find that the detective was truthful based upon facts contained in the record. As a result, the prosecutor's argument about the lead detective was not improper. See Moore v. State, 278 Ga. 397, 400(2)(e), 603 S.E.2d 228 (2004).

Johnson also claims that his trial lawyer should have objected when the prosecutor argued that the jury should not hold it against the State that many of its witnesses were either drug users or people who sold drugs. According to the prosecutor's argument, even though such people might not be the most reliable witnesses, it was Johnson who chose to associate with them. While Johnson asserts that this argument improperly put his character at issue, prosecutors have wide latitude in conducting closing argument, and they may comment upon and draw deductions from the evidence presented to the jury. See Davis v. State, 285 Ga. 343, 347(7), 676 S.E.2d 215 (2009). Here, the prosecutor's argument was based on the facts in evidence and was not improper. And because the arguments made by the State in closing were not improper, they did not require any curative instruction by the trial court, and the failure to make an objection to those arguments cannot constitute ineffective assistance. See Scott v. State, 290 Ga. 883, 889(7)(a), 725 S.E.2d 305 (2012).

Judgment affirmed.

All the Justices concur.