The removing, towing and storage charges provided for in § 72.36 shall be a lien upon the vehicle, and the payment thereof shall not release or relieve the owner and the person in charge of such vehicle at the time of the violation for which the same was impounded from prosecution for any violation of law which may have been involved in the circumstances which resulted in the impounding of such vehicle. The city and/or any custodian of such vehicle shall not be liable for any damage to the vehicle while stored or for the removal of the contents of any stored vehicle.
(`94 Code, § 72.37)