Galt police have arrested a fourth person in the shooting of a teen.
Hector Caballero, 18, was arrested Monday on suspicion of killing Ricardo Guerrero, 17, of Galt.
Guerrero was shot to death at 9:30 p.m. Nov. 24 outside of a home in the 400 block of Second Street.
Caballero, a Galt resident, was arrested without incident after a traffic stop on 38th Street in Sacramento on Monday.
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Three additional suspects, two adults and a 14 year old, had already been arrested in connection with the killing. The adults were identified as Damien Flores, 23, of Acampo and Hector Ojeda, 18, of Galt.
Officers are trying to determine a motive for the shooting, according to a police press release.