Christopher Nevarez, 18, died Oct. 7, four days after he was shot in Dallas, and a 15-year-old boy is in custody, police said. Officers responded around 7:30 p.m. Oct. 3 to a call in the 8200 block of Walnut Hill Lane. Investigators later determined that Nevarez and the 15-year-old arrived at a hospital in a private vehicle after being shot elsewhere. Nevarez had a gunshot wound to the neck and was in critical condition; the younger teen had been shot in the hand, according to police. Police say the 15-year-old shot Nevarez from behind while they were sitting in a car, then shot himself in the hand. The Dallas Police Fugitive Unit arrested the teen on Oct. 5 on a warrant alleging aggravated assault with a deadly weapon. After Nevarez died, police said they would update the charge in the case to manslaughter. The juvenile remains in custody, and the investigation is ongoing. Anyone with information can contact Dallas police Det. A. Knoebel at 469-849-3755 or andrew.knoebel@dallaspolice.gov.