The 18-year-old who reportedly discharged a handgun in Fairfax County on Monday, killing a 16-year-old acquaintance and wounding a 14-year-old, allegedly ran out of the home where the shooting occurred saying, “I’m sorry, I’m sorry,” according to a search warrant.

Police later stopped that teen, who raised his hands and said, “I did it,” the filed court document shows.

The search warrant contains fresh details about the circumstances of the incident, which Fairfax police have said little about and has left some people who knew the teens baffled. Friends said the three grew up together in the Pembroke Village neighborhood in the Alexandria section of the county.

Police filed the search warrant in order to look for clues in the home where the shooting occurred. The document shows that investigators removed samples of bloodstains.

A person who was in the home on Pembroke Village Drive about 8 p.m. Monday told authorities that there was a “loud bang” and then heavy footsteps coming from an upstairs bedroom. Seconds later, one of the victims appeared on a staircase and pleaded for that person to call 911.

A few minutes later, three people ran down the staircase and out of the home, according to the search warrant. It was at this point that a witness heard the apparent shooter saying, “I’m sorry,” according to the warrant. The same teen was stopped a short time later by officers, and he told them that he had fired the gun.

Officers recovered a gun near the home, according to the search warrant. A witness also told investigators of going back into the home before police arrived and seeing that someone was hurt in the upper bedroom. That victim was Kevin Johnson, a student at Bryant Alternative High School and an aspiring rapper who later died at a hospital.

The 14-year-old who was injured was in stable condition with wounds that were not believed to be life-threatening, police said. He has not been identified.

The 18-year-old who reportedly discharged the weapon has not been charged, and police declined Wednesday to provide any additional details about how the shooting occurred or say whether it was accidental or intentional. They said the investigation is continuing.

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