Porfirio Medina followed a vehicle after a near-collision before a passenger fired one shot, prosecutors said.
PHOENIX, Ariz. — Porfirio Medina was riding a scooter through Phoenix late on Aug. 21, 2025, when a near-collision with a vehicle led him to follow it to the next red light, an encounter that ended with Medina fatally shot and a teenager eventually sentenced to 14 years in prison.
The sequence now described by prosecutors lasted only a short time but became the heart of the criminal case against Henry Gonzales. Medina, 45, approached the passenger side of the stopped vehicle after following it to the next intersection near Seventh Street and Buckeye Road. Gonzales was in the vehicle. According to the Maricopa County Attorney’s Office, Gonzales lowered the passenger-side window and fired a single shot that struck Medina in the chest. The public accounts do not say Medina was armed, do not describe him firing a weapon and do not explain exactly what words were exchanged before Gonzales opened fire. The vehicle then left the area.
Police were called to the area at about 10:45 p.m. A department advisory lists the incident at roughly 10:47 p.m. Officers found Medina with at least one gunshot wound and had him taken to a hospital, where he died. In those first hours, much of what is now publicly known had not been released. Police said only that detectives were investigating a downtown Phoenix shooting that had killed a man. They identified Medina, gave his age and location and asked anyone with information to contact Silent Witness. The traffic confrontation, the near-collision and the events at the red light were not part of the initial public narrative.
The vehicle’s departure became an important fact as the investigation developed. Prosecutors later said the people inside drove away without calling 911 or reporting the shooting. That meant the case did not begin with a shooter waiting at the scene to explain what happened. Detectives instead had to work backward from the intersection, the wounded victim and whatever evidence remained around the area. The county attorney’s office said surveillance footage, license plate readers and cellphone location data helped investigators identify the vehicle and eventually Gonzales. Officials have not publicly provided the full chain of those records or specified which piece of evidence first focused the investigation on him.
Within about two weeks, police announced that a juvenile suspect had been identified. A Sept. 3, 2025, Phoenix police update said a teenage boy had been referred to the Juvenile Court Center. Local reports also said a teen had been taken into custody. By then, the investigation had moved well beyond the sparse information released after Medina’s death, but police still had not publicly laid out the complete traffic-dispute narrative that prosecutors would disclose later. The medical examiner classified Medina’s death as a homicide, according to Arizona’s Family. That classification describes the manner of death and does not, by itself, determine the level of criminal responsibility assigned to another person.
Investigators also obtained statements from Gonzales about the handgun. The county attorney’s office said he admitted acquiring it illegally several days before the shooting while knowing that, as a minor, he could not legally possess it. He further admitted that he sold the gun after Medina’s death. Prosecutors said Gonzales told investigators he got rid of the firearm because he feared he could use it again during another confrontation. The office did not identify the seller who allegedly provided the weapon to him, the later buyer or recipient, or whether investigators recovered the handgun. No public document reviewed for this story describes the gun’s later path beyond Gonzales’ reported admission that he sold it.
Almost a year after Medina was killed, the case reached its final announced disposition. Gonzales pleaded guilty to one count of manslaughter, a Class 2 dangerous felony, according to the Maricopa County Attorney’s Office. Prosecutors announced Aug. 19, 2026, that he had been sentenced to 14 years in the Arizona Department of Corrections. The guilty plea meant a trial was not required to establish Gonzales’ responsibility for the manslaughter offense. The sentencing release does not say when the plea was entered, summarize any defense argument presented at sentencing or publish the judge’s reasoning for imposing the 14-year term.
Reporting by KTAR indicates the prosecution had once included more serious allegations. The outlet reported that Gonzales originally faced first-degree murder, second-degree murder, committing a drive-by shooting and a charge related to a minor carrying a firearm. The case ultimately ended with the single manslaughter conviction announced by prosecutors. The difference between an initial charging decision and a final plea is important: initial charges are allegations, while the manslaughter count is the offense to which Gonzales admitted guilt. The available county attorney announcement does not explain the negotiations or evidentiary considerations that produced the plea agreement, so those reasons should not be inferred.
One detail in the official record remains inconsistent. Phoenix police described the juvenile suspect as 16 years old when they announced his identification in September 2025. The county attorney’s office, in contrast, later said Gonzales had been 15 at the time of the Aug. 21 shooting. Its release lists his birth month and year as August 2009 but does not give a day. Depending on the exact birth date, an August 2009 birth could place him on either side of his 16th birthday when the shooting occurred. Without the full birth date, the conflict cannot be settled from the released documents. For that reason, describing Gonzales simply as a juvenile at the time avoids overstating a disputed detail.
Maricopa County Attorney Rachel Mitchell framed the sentence around the abrupt escalation from traffic conflict to lethal violence. She said the encounter changed the lives of two families and emphasized the consequences of choosing to use a firearm during a confrontation. Her remarks were issued by the prosecutor’s office after the guilty plea and sentencing. They do not substitute for facts not contained in the case record. The public materials reviewed do not include comments from Medina’s family about the sentence, and they do not include a response from Gonzales or his lawyer to Mitchell’s statement.
For Medina, the chronology ends where the case began: at a Phoenix intersection late at night. A near-collision was followed by his decision to follow the vehicle and approach its passenger side while traffic was stopped. One shot was fired. The car left, officers arrived and Medina was taken to a hospital but died. Only later did the broader story become visible through investigative records, Gonzales’ statements and the prosecution. Those later findings transformed what had initially been reported as an unexplained homicide into a documented traffic confrontation followed by a manslaughter conviction.
The 14-year sentence is now the controlling outcome announced in Gonzales’ case. Officials have not identified criminal charges against the other vehicle occupants in the materials reviewed, and several details about the brief exchange before the gunfire remain outside the public record. What is established is that Medina died after the encounter, Gonzales admitted guilt to manslaughter and the court imposed a prison sentence that extends years beyond the night the two crossed paths.
Author note: Last updated September 28, 2026.