Investigators say the minivan driver made a turn after Thursday's collision and drove to his Mojave Desert home a half-block away before discovering he had a new passenger.
The Victorville Daily Press first reported the crash.
Witnesses say the motorcycle crashed and slid under the minivan on a Victorville street and the biker couldn't be found.
Investigators say the minivan slowed or stopped to make a turn and the motorcyclist slammed into the vehicle.
San Bernardino County sheriff's spokeswoman Karen Hunt says the minivan driver had already committed to the turn and drove a short distance to his home. He then discovered the motorcyclist in the back seat.
