14602.6. (a) (1) Whenever a peace officer determines that a person was driving a vehicle while his or her driving privilege was suspended or revoked, driving a vehicle while his or her driving privilege is restricted pursuant to Section 13352 or 23575 and the vehicle is not equipped with a functioning, certified interlock device, or driving a vehicle without ever having been issued a driver’s license, the peace officer may either immediately arrest that person and cause the removal and seizure of that vehicle or, if the vehicle is involved in a traffic collision, cause the removal and seizure of the vehicle without the necessity of arresting the person in accordance with Chapter 10 (commencing with Section 22650) of Division 11. A vehicle so impounded shall be impounded for 30 days.
So, the question from this statue is this : is the word "shall" mandatory with this statue. Most statues that have the word "shall" it is mandatory but it is examined on a case by case basis. I would think that the word shall here, is not mandatory.
The statue allows the officer to decide to impound .. so that part is not mandatory & for that reason, I think that the 30 day provision is also not mandatory
... to see if a part is mandatory one must look at the statues intent ... here it is to get the car off the road so that only a licensed driver can retrieve it. Clearly, this 30 days is not meant to be a punishment (otherwise cops become judges in this statue, right?) --- the 30 days is not mandatory IMO.
Ask for the car back...GO TO THE POUND and demand it back (make a record of the encounter -- ask them to sign a refusal form)...then if they refuse, you can sue for damages in small claims.
According to OSHA; police officers and fireman's on the job death rate is one of the lowest per occupations ... FYI (the unions use this argument for better pay/benefits) ... logically, this argument fails. My occupation has a job related death rate 1.5x that of police officers...am I a hero? No. And I respect all people, not just cops .. you should too.

