On Saturday April 20, 2024, at approximately 2:17 PM, it was reported to 9-1-1 a solo motorcycle collision had occurred in the 2400 block of Tomales Petaluma Road, east of Twin Bridge Road in West Marin. Reportedly the rider of a 2018 Suzuki GSX-R 1000 sport style bike, who had been riding with a group of motorcyclists, for reasons unknown and remain under investigation, lost control of his motorcycle leaving the roadway, collided with a fence, and then struck a utility pole. The rider was ejected from his motorcycle upon impact with the fixed objects and sustained major traumatic injuries. The subject was discovered to be unconscious and unresponsive moments following the collision. Medical aid was immediately provided by bystanders until the arrival of First Responders at the scene; the subject was discovered to be in cardiopulmonary arrest. Paramedics provided additional resuscitative aid. Most regrettably, the subject failed to respond with his death declared at 2:41 PM.

The decedent has been positively identified as:                                           

Marco A. HERNANDEZ CASTELLANOS, a 53-year-old male from Citrus Heights, CA.

A forensic postmortem examination with routine toxicology testing is scheduled for Tuesday April 23, 2024. The cause and manner of death will be pending the conclusion of the investigations being completed by the California Highway Patrol – Santa Rosa Office and the Marin County Sheriff’s Office - Coroner Division. No further information will be released by the Coroner Division at this time, as this is an active and ongoing investigation. Any further questions regarding the incident should be directed to the California Highway Patrol – Santa Rosa Office.

The Marin County Sheriff’s Office and personnel of the Coroner Division offers our sincerest condolences to the family and friends of Mr. Hernandez Castellanos.

CONTACT

Roger G. Fielding

Chief Deputy Coroner 

415-473-6043