John Martin Dixon pleaded guilty more than a year after Emmanuel Menchaca was shot three times outside his family’s Houston home.

HOUSTON, Texas — A Houston man has been sentenced to nine years in state prison after pleading guilty to aggravated assault with a deadly weapon in the shooting of an 18-year-old neighbor who had gone outside after midnight to bury his pet guinea pig with his younger brother.

John Martin Dixon, 46, entered the plea Aug. 24 in Harris County in connection with the July 17, 2025, shooting of Emmanuel Menchaca. Harris County court records reviewed by Law&Crime show that 180th District Court Judge Tami Pierce imposed the nine-year sentence. Prosecutors dropped a second aggravated-assault count under the plea agreement, and Dixon received credit for 23 days he had spent in pretrial custody. The plea brought the criminal case to a resolution more than a year after a shooting that seriously injured Menchaca, sent his family away from their home and eventually put Dixon on Texas’ 10 Most Wanted Fugitive List.

The case began shortly after midnight on July 17, 2025. Menchaca, a recent high school graduate, had returned from work and went outside with his younger brother to bury a guinea pig named Cookie, according to family accounts and police records reported by Houston news organizations. Menchaca’s mother, Andrea Menchaca, said her son had discovered the animal dead earlier but could not hold the burial until he finished his work shift. The brothers went into the yard together, completed the burial and then headed toward the front of the home. Police records say gunfire followed as they moved through the driveway area. Menchaca was struck three times. His younger brother was not hit.

A criminal complaint later described the brothers’ account of what happened next. Menchaca told investigators he initially felt what seemed like a force pushing him from behind before realizing he had been shot. His younger brother took cover near a vehicle as the shooting continued and later told investigators he saw Dixon outside with a firearm, according to reporting based on the complaint. Home surveillance video released to Houston television stations showed Menchaca falling outside the house and his brother running. Both brothers ultimately made it back inside, where they alerted their parents. Menchaca was rushed to a hospital in critical condition.

The shooting left Menchaca with extensive internal injuries, according to his family. Andrea Menchaca told ABC13 that her son’s liver, a lung and his diaphragm were injured. He required intensive hospital care and remained in the ICU as his parents publicly sought answers. The family said the attack also disrupted plans that had been set in motion before the shooting. Menchaca had expected to move to San Antonio and begin college soon after graduating from high school. Instead, the weeks after the attack centered on surgeries, medical treatment and recovery. His family also said it no longer felt safe staying at the home where the shooting happened.

For weeks, no arrest followed. Police developed John Martin Dixon, who lived nearby, as a suspect, and Menchaca’s younger brother identified him to investigators, according to records cited by local news organizations. The complaint also described evidence connected to a firearm recovered from the Dixon residence. Dixon’s father told investigators that he and his son had used the gun earlier that day to shoot animals near the home and that no one else used it, according to the complaint. Authorities did not publicly establish a motive for the attack, and Menchaca repeatedly said after the shooting that he did not understand why he had been targeted.

The delay between the shooting and an arrest became part of the public story. Menchaca’s family appeared with FIEL Houston, an immigrant-led civil rights organization, to press for progress in the investigation. Emmanuel Menchaca, after leaving the hospital, also spoke publicly about the physical and emotional effects of the attack and questioned why the person police suspected had not yet been taken into custody. Harris County District Attorney Sean Teare later said investigators needed enough evidence to support a strong case, including physical evidence that could corroborate eyewitness accounts. A warrant for Dixon was issued Aug. 9, 2025.

Texas authorities subsequently added Dixon to the state’s 10 Most Wanted Fugitive List. The Texas Department of Public Safety said he was wanted for aggravated assault with a deadly weapon involving a firearm and offered a reward of up to $3,000 for information leading to his arrest. Houston police took Dixon into custody on Aug. 25, 2025, in Houston. DPS later said the capture did not result from a Crime Stoppers tip and therefore no reward was paid. The arrest removed the immediate uncertainty that had followed the family as Dixon remained wanted.

By then, Menchaca had begun trying to resume plans interrupted by the shooting. Local reports said he moved to San Antonio and started college after his release from the hospital. In an interview after Dixon’s arrest, Menchaca said knowing the suspect was in custody eased fears that he might return to the family’s neighborhood. His mother’s online fundraiser, created during his recovery, described him as a 2025 high school graduate who enjoyed soccer, working out and animals. The fundraiser said the family sought help with medical expenses, lost wages and the costs associated with moving after the shooting.

The criminal case continued after Dixon’s arrest. Law&Crime reported that a formal indictment was issued in January 2026. The case ultimately ended without a trial when Dixon pleaded guilty to one count of aggravated assault with a deadly weapon. That outcome differs from the legal posture during the first months after the shooting, when Dixon faced two aggravated-assault allegations related to the gunfire directed toward the brothers. The second count was dropped as part of the agreement reported in the court record. The plea means the allegation covered by Dixon’s conviction is no longer merely an accusation; he admitted guilt to the offense for which Pierce sentenced him.

The nine-year prison term resolves the prosecution but does not answer every question that followed the shooting. Publicly available accounts have not established why Dixon opened fire on Menchaca and his brother as they returned from burying the pet. Menchaca said in interviews during his recovery that his interactions with Dixon before the shooting had been limited and that he could identify no dispute that explained what happened. Authorities have likewise not announced a motive in the reporting reviewed for this story.

To the Menchaca family, this legal resolution comes after more than a year marked by intensive medical treatment, displacement, a search for the suspect and the start of a criminal case that once appeared likely to involve two felony counts. Emmanuel Menchaca survived, recovered enough to begin college and saw the man accused in the attack arrested before the case reached its guilty plea. Dixon is now sentenced to nine years in state prison, with credit for 23 days previously served. No additional criminal proceeding stemming from the shooting has been publicly announced in the sources reviewed.

Author note: Last updated September 30, 2026.