Harris has been a vocal proponent for gun control her entire career. While serving as District Attorney in Alameda County Harris recruited other District Attorneys and filed an amicus brief in District of Columbia v. Heller, arguing that the Second Amendment does not protect an individual’s right to own firearms
She did all you noted.
She apparently hired a lot of armed people as her AG police force to go out and investigate gun ownership legal and so called not illegal.
They were allowed to confiscate weapons at their will in homes and vehicles.