This is a customer service issue, not a legal issue. You have no injury to sue for. Rudeness is not grounds for a lawsuit.

Respectfully, the school found THC residue, and you want to sue the school? I see no basis for a lawsuit.

IMO, the fact that you didn't take it home is irrelevant. You signed a contract. You own the car. A lawyer would need to review the entire contract...

While you don't have any damages to sue for, you should certainly report the matter to the city and/or state licensing authorities.

Legal and prudent for officer safety. AVVO requires me to write more characters, so here they are........

IMO, you have no grounds to sue anyone. You can call the code enforcement authorities and report them. And deal with your daughter.

Generally speaking a property owner is not responsible for the criminal acts of third parties on their premises.

One can be under the influence of a number of different substances besides alcohol. If charged, it is time to lawyer up.

No. It means that whatever you alleged is not considered an ethical violation but more of something to potentially sue for. Candidly, that is a...

Certainly nothing in your post indicates grounds to sue anyone here in the US. I can't speak for Germany.