An off-duty Fontana police officer was killed while riding his motorcycle on a mountain road above Azusa.
Officer Thomas Chamberlin, 26, died about 8:30 p.m. Tuesday when he lost control on Highway 39 in the Angeles National Forest, according to announcements made Wednesday by the Fontana Police Department and California Highway Patrol.
Chamberlin "veered off the roadway in a westerly direction, subsequently striking the side of the mountain," the CHP said.
He was airlifted to USC-Los Angeles County Medical Center in critical condition with substantial head injuries, according to the patrol release. He later died at the hospital.
Chamberlin was a U.S. Marine from 2006 to 2011, serving in Iraq and Afghanistan, according to a statement from the Fontana Police Department. After being honorably discharged, he attended Cal State Fullerton.
He was hired by the Fontana Police Department in June 2013, and graduated in December from the San Bernardino County Sheriff's Department Police Academy.
The California Highway Patrol is investigating the crash.