Bobadilla is not considered at fault for the Saturday crash on Route 98 east of San Diego.
An unknown driver in a gold Honda Civic tried to pass a group of bikers and drove head-on toward Bobadilla, who swerved, over-corrected and collided into the group. Four riders were killed, and a female passenger in Bobadilla's car was also killed.
Investigators will check surveillance video at a border crossing to see if the driver went to Mexico.
The CHP withheld the names of the five who died, pending notification of next of kin.
The Associated Press contributed to this report.