ALAMEDA COUNTY, CA — September 25, 2026 A 17-year-old Mountain House High School student, Trezur Leighane Destyne Williams, died after a collision involving a Honda Civic and a commercial tractor-trailer on Mountain House Road in Alameda County, according to the California Highway Patrol (CHP).
The crash occurred shortly after noon on September 25, north of West Grant Line Road. Williams was riding as a passenger in a Honda Civic when it collided with a Freightliner Cascadia tractor hauling two end-dump trailers.
Williams, a senior at Mountain House High School, was among those involved in the serious collision. The circumstances that led to the crash have not been fully established, and investigators continue to examine the incident.
Authorities are seeking information from anyone who may have witnessed the collision or observed the vehicles shortly before the impact.
