The 10-year-old Modesto boy shot Tuesday night died Friday morning.
The boy was shot in the head about 11:30 p.m. in the living room of a house in the 100 block of Santa Barbara Avenue in Modesto. Witnesses said two men drove up to the house, got out of the car, opened fire, then drove off.
A 29-year-old Modesto man, Jason Cyphers, was also killed.
No arrests have been made, said Modesto police Detective Steven Stanfield.
The boy, whose name has not been released, had been on life support since the shooting.
His father, 34-year-old Epifanio Ramirez, also was shot and lost a finger. Agents from the Bureau of Alcohol, Tobacco, Firearms and Explosives arrested Ramirez on a federal no bail warrant and booked him at the San Francisco County Jail.
Investigators have said they believe the shooting was gang-related.