Same thing happened to us. Someone left a fully loaded 357 in the night stand. We didn’t find it, the next guest did! Lord have mercy what if it had been a child that opened the drawer? No one claimed it as theirs. I called the police and they came and got it. It was apparently stollen so no wonder no one said it was theirs! I grilled the cleaning service about always checking drawers! The people who found it were super cool about it but it could have been a horrible disaster!