License Plate 8SLL110 in California, United States

Blocked Driveway & Illegal Parking at 550 15th St. Red and white RVs 2 Rvs and Red BMW with license plate CA 8SLL110 Parked illegally and also people living there know to be violet, involved in drug dealing and armed robbery. please help us with this issue, i have made 2 request before more than 62 days old. do we have to wait for someone to get hurt??