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.
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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.