Police damage my vehicle when used lightly

Tonight, the police of my home town slightly damaged the rear door (driver’s side) during an operation. I parked in the parking lot of a supermarket next to a police vehicle. Shortly before entering the supermarket, I learned that the officers were taking a drunken person who was fighting back. For a short time, I watched this happen and saw from a distance that the drunken person was forced into the back seat. Without further thought, I did my job. When I came to my vehicle, she saw the dent on the back left. So on to the police. Now she told me to file a criminal application against the drunken, because he would have kicked the door from the inside. His liability insurance would then regulate the damage. I, however, was and am of the opinion that the police had to pay for the damage, since it is the vehicle owner (in addition, the officials could have reset the car if a problem-free e-mail system were found. I don’t know if the drunk person really kicked the door. Furthermore, the question arises whether a person on the side of society has a liability security at all? The damage was also caused by the police vehicle etc. … Does anyone know the legal situation? Who has to pay (the state or the arrested person). Shouldn’t the police regulate my damage (as collateral damage of the operation) and then Anyway, I am grateful for every tip. Otherwise, I wish everyone a nice Pentecost.