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Houston police said the deadly shooting happened at about 2 p.m. on Aug. 7, 2022, at 9550 Deering Drive.
The victim, identified as 18-year-old Patrick Jackson, Jr., was found unresponsive with multiple gunshot wounds on a sidewalk inside the complex, according to police.
Paramedics arrived and pronounced Jackson dead.
Detectives learned that the shooting stemmed from a possible dispute between Jackson Jr. and the suspect, who allegedly shot him and fled the scene.
The 15-year-old suspect was referred to the Harris County Juvenile Probation on a murder charge, HPD said.
Authorities said he was in custody for an unrelated charge.