Investigators say the case changed after a homicide ruling and a witness provided a new account of what happened inside a Washington apartment.

WASHINGTON, D.C. — More than a year after 14-year-old Zytina Mason-Brown was found fatally shot inside a Northeast Washington apartment, police arrested a 17-year-old boy and charged him with second-degree murder while armed, marking a sharp change from the account investigators were given immediately after her death.

The Metropolitan Police Department said the teenager, who was 15 when Mason-Brown died, was arrested Aug. 26 pursuant to a D.C. Superior Court pre-petition custody order. The arrest followed a 15-month investigation in which Mason-Brown’s death went from a reported self-inflicted shooting to a homicide case. A judge found probable cause at a post-arrest hearing the following day, allowing the murder case to move forward. Authorities have not publicly identified the accused teenager because he is a juvenile.

The case began at about 5:08 p.m. May 21, 2025, when Fifth District officers were sent to the 1700 block of Benning Road NE for a reported shooting. Police found Mason-Brown unconscious and not breathing with a critical gunshot wound. D.C. Fire and EMS personnel responded but found no signs of life, and she was pronounced dead at the scene. Mason-Brown lived in Clinton, Maryland, and was an eighth grader. Her family later said she hoped to become a beautician and a real estate agent.

What happened before police arrived would become the central question of the investigation. According to testimony later given by a Metropolitan Police detective, the boy told investigators that he had obtained a gun from his uncle and that Mason-Brown had been handling it while making social-media videos. He claimed that she accidentally shot herself. Another girl who had been in the room initially gave police an account that supported his version, according to testimony reported from the teenager’s post-arrest hearing.

The initial account did not settle the case. The D.C. Office of the Chief Medical Examiner continued its examination of Mason-Brown’s death and on Aug. 19, 2025, classified the manner of death as homicide. The ruling came nearly three months after the shooting and established that investigators were no longer treating the death as the result described in the initial statements. Police subsequently circulated a homicide bulletin identifying Mason-Brown and sought information from the public, at the time offering a reward of up to $25,000 for information leading to an arrest and conviction.

Mason-Brown’s relatives had also questioned the early explanation. Her aunt, Dawna Cooke, told FOX 5 in September 2025 that the family had been seeking answers because she did not believe Mason-Brown had killed herself. Her grandmother, Michelle Brown, described the death as senseless. Those comments came before anyone had been charged with murder and while detectives were still trying to determine what occurred inside the apartment. The family’s doubts did not establish what happened, but they became part of a case in which the official account would continue to change as investigators gathered more information.

A major development came when the girl who had been in the room returned to investigators months after the shooting and gave a different account, according to a detective’s court testimony reported by WJLA. The witness said Mason-Brown had been making TikTok videos when the boy began dancing close to her. She said Mason-Brown pushed him away, returned the gun to him and sat down. According to the witness’s revised account, the boy then sat across from Mason-Brown and shot her. Prosecutors must still prove their allegations in court, and the witness’s account has not been established as fact by a trial verdict.

The witness also described what allegedly happened immediately afterward. She said the boy’s mother, who was in the home, knocked on the door after hearing the gunshot. The witness told investigators the boy instructed her to remain quiet before police were called, according to the detective’s testimony. Authorities said the girl had initially supported the claim that Mason-Brown shot herself. WJLA reported that the witness was arrested in June 2026 for allegedly lying to police. Her later statement became one part of the evidence presented after the murder arrest.

Investigators also examined information beyond the competing statements. At the August hearing, police indicated that social-media messages and apparent images connected to the aftermath raised the possibility that other people may have been present or had information about the shooting. Public reporting has not established exactly who else, if anyone, witnessed the gunfire. The existence of messages or images does not by itself establish who fired the gun, but investigators used the material as they tried to reconstruct who was in the apartment and what occurred around the time Mason-Brown was killed.

The teenager had already faced allegations related to the weapon before the homicide charge was filed. In September 2025, FOX 5 reported that he had been charged with possession of an unregistered firearm and tampering with physical evidence. More than a year after Mason-Brown’s death, police obtained the custody order that led to his arrest on the far more serious allegation of second-degree murder while armed. The department’s Aug. 26 announcement did not lay out the evidence supporting the new charge, but details became public when a detective testified in court the next day.

At that hearing, the judge found probable cause for the case to continue, according to WJLA. A probable-cause finding is not a determination that the teenager is guilty. It means the court found a sufficient legal basis for the case to proceed at that stage. Public reports following the arrest did not establish that the teenager had entered a plea, and because he is being handled as a juvenile, some case information is not publicly available in the same way it would be in an adult criminal prosecution.

The sequence of events leaves an important distinction between what investigators allege and what has been proved. Police confirmed Mason-Brown was fatally shot in the Benning Road apartment, the medical examiner classified her death as homicide, and a teenager has been charged. The allegation that the boy intentionally shot her after the interaction described by the witness comes from the criminal investigation and court testimony. The accused teenager is entitled to the presumption of innocence, and the charge itself does not establish guilt.

The arrest nevertheless represents the most significant public development in a case that spent months without a homicide arrest. Mason-Brown’s death was initially discussed as a shooting she had inflicted on herself; the medical examiner’s finding changed the official classification, and a witness later repudiated the account she had first given investigators. Those developments eventually brought police back to a teenager who authorities say had been inside the apartment from the beginning.

As of the latest publicly available reporting reviewed for this article, the second-degree murder while armed case remains pending. No later disposition or trial verdict was publicly confirmed in the sources reviewed, and police have continued to identify the defendant only as a 17-year-old juvenile from Southeast Washington. The court process will determine whether prosecutors can prove the allegations that transformed Mason-Brown’s death from an initially reported accident into a murder prosecution.

Author note: Last updated Oct. 17, 2026.