We had an incident that a guest was selling drugs from her room and kept a dog ( we have a no pet policy).
My wife saw cars driving by...stopping and going to the room and then leaving.

I went to the room and heard a dog so I evicted her for keeping a dog, as I had no evidence of her selling drugs, even though there were small plastic bags and white powder found in the room after she left.
She also took the sheet and put all her "stuff" in the sheet

I reported the matter to the Police (even had reg numbers of the cars) but they told me it was all allegations with no proof.

So I put it down to experience and the fun of running a Motel