22 years ago, I was living in an apartment with 3 roommates. One of them was in a long-distance relationship, and one night his girlfriend broke up with him over the phone. He said something along the lines of, "If you break up with me then I don't know if I can live with myself." So she calls her PD, they call our PD, and I come home from dinner with friends to find two EMTs and three cops in my apartment.
The authorities were telling him that he had to go to the hospital for a mental health check, while him, my other roommates, and I, were trying to convince them that it was a misunderstanding and while he was understandably upset over the end of the relationship, he was not suicidal. The cops threatened to arrest him if he didn't consent, so off he goes. He was back home less than an hour later after being "evaluated" by hospital personnel.
Anyway, I had a cheap, unsharpened display katana hanging on the wall. During the hullabaloo, one of the cops took it down and headed for the door with it. I told him it was my property and he did not have permission to take it. This resulted in a brief discussion on state law, which to my astonishment I won. He then asked me if there were any other weapons in the house, to which I flatly replied "None of your business." Which, as a 21 year old, was terrifying to me because OMG COPS and there were several firearms under lock and key and I had my Beretta 92FS concealed on my belt. But I knew my rights, and the cops left empty-handed (except for my roommate, of course).
