[05-31-2025] Orange County, CA – Motorcyclist Killed in Suspected DUI Crash Involving Trailer on Bastanchury Road in Fullerton

A motorcyclist was killed in a two-vehicle crash involving a trailer in Fullerton early Saturday morning, May 31, 2025.

According to the Fullerton Police Department, officers responded around midnight to a collision near the intersection of Euclid Street and Bastanchury Road. 

At the scene, authorities found a heavily damaged 1993 Harley-Davidson motorcycle and a 2007 Chevrolet Tahoe attached to a 1996 Prowler recreational trailer.

The motorcyclist was found on the ground with severe injuries and was pronounced dead at the scene. The trailer had visible collision damage and was stopped in the roadway west of the intersection.

Investigators said the Chevy was initially stopped in the center median of Bastanchury Road due to a mechanical issue. A man attempted to reverse the vehicle, which caused the trailer to jack-knife and extend across the westbound lanes, directly into the path of the motorcyclist who was heading westbound from Euclid Street.

Both the female driver of the Chevy and the male who moved the vehicle were arrested at the scene on suspicion of driving under the influence of drugs. Authorities have not confirmed whether drugs or alcohol contributed to the motorcyclist’s actions.

The investigation is ongoing.