Discovery Bay driver arrested for San Francisco fatal vehicle collision | Contra Costa Herald

Killed pedestrian, struck 3 more people

By San Francisco Police Department

On May 25, 2026, at approximately 12:13 am, San Francisco Police officers responded to the area of 16th and Mission Streets regarding a vehicle collision.

Officers were advised that a collision occurred between a vehicle and a pedestrian.

Officers arrived on scene and located a pedestrian victim being treated by paramedics for life threatening injuries. Paramedics transported the victim to a local hospital.

Despite lifesaving efforts of medical staff, the victim was later declared deceased at the hospital.

A preliminary investigation revealed that a vehicle collided with a pedestrian and struck three additional victims.

The three victims were medically assessed on scene for non-life-threatening injuries.

Through the course of the investigation, officers located the suspect vehicle and detained the occupant of the vehicle.

The Traffic Collision Investigations Unit (TCIU) responded to scene and conducted their investigation.

Through the course of the investigation, TCIU investigators developed probable cause to arrest the driver identified as 57-year-old Samuel Powell of Discovery Bay on June 30, 2026.

Powell was arrested and charged for vehicular Manslaughter 192(c)(2) PC and the driver’s responsibility to exercise due care for the safety of any pedestrian within the roadway 21955(b)(3) CVC.

Although an arrest has been made, this remains an open and active investigation. Anyone with information is asked to contact the SFPD at 415-575-4444 or text a tip to TIP411 and begin the message with SFPD.