Have you considered going through the MVD? Police is usually not the way to go, as no crime/violation was committed.
https://www.dmv.ca.gov/portal/dmv/detail/pubs/brochures/fast_facts/ffdl10
Two wheels good. Four wheels bad.
https://www.dmv.ca.gov/portal/dmv/detail/pubs/brochures/fast_facts/ffdl10
Two wheels good. Four wheels bad.