PALMDALE, Calif. (AP) — A Los Angeles County Sheriff’s Department deputy has died after he was shot in his patrol car by an unknown assailant and an investigation is underway that the sheriff says will press all of the department’s resources into action. Deputy Ryan Clinkunbroomer, 30, died after being transported to Antelope Valley Medical Center in Lancaster. Sheriff Robert Luna said Saturday night the preliminary investigation shows Clinkunbroomer was driving while on duty and fired upon around 6 p.m. He was found unconscious in his vehicle by a person Luna identified as a “good Samaritan” who alerted the Palmdale sheriff’s station. Luna says he believes the shooting was a “targeted attack” but the motive is not yet known.