Two men were found shot to death in a vehicle along Highway 35 in the Santa Cruz Mountains on March 24, 2025. Colter White, 53, of Los Gatos, and 45-year-old Sean Pfeffer of Boulder Creek were discovered in the back of an abandoned pickup near Castle Rock. The Santa Clara County Medical Examiner’s Office confirmed both died from gunshot wounds; White had wounds to his torso and his left upper and lower extremities, while Pfeffer died of a gunshot to the chest.

Friends and family described White as a devoted father and husband who had been trying to turn his life around after past legal troubles. Pfeffer had posted a message on Facebook the day before he was found, naming James David Collier as a potential threat and saying he planned to confront Collier over an unresolved dispute.

California Highway Patrol detectives arrested 66-year-old James David Collier at his Boulder Creek home on April 28, 2025, after a month-long investigation; a search warrant was served at a residence associated with him on April 9. Authorities have not disclosed exactly where or when the shootings occurred. Does anyone who knew Colter White or Sean Pfeffer have information that could clarify what happened that night?