The shooting occurred around 8:45 p.m. near Ramona and Baldwin Park boulevards in a Burger King parking lot.
The officer had just finished a traffic stop and was pulling out of the parking lot when his window exploded.
Lt. Chris Kubbery said that the neighborhood and surrounding area were being searched as a precaution with the help of K-9 units and a helicopter.
One resident said one person was killed down the street and that this situation has people a little scared.
The shooting suspect remained outstanding.