protip: don’t get yourself locked into Auschwitz, and don’t get interrogated
Always decline any invitation to use the shower facility.
The bottom line to this deal is that vandals, many of whom are neo-Nazis, often try to break into the camps to destroy and steal stuff. And the local police are *not* going to be nice to neo-Nazis.
This was exacerbated by the language barrier, none of the cops speaking Italian, and none of the Italians speaking Polish.
So put it down to misunderstanding.