When I was in my early 20's I worked at a gas station. Many police officers frequented our restroom. We kept a clean restroom, and it was the kind you went in, and locked the door. I lost count of the radios that were left behind on the TP dispenser. Twice guns were left behind. One uniformed cop left his service gun on the tank of the toilet. One Plain clothes detective left his service revolver on the sink. I found the weapons. Put them under the counter by the register. Both times they came back in less than 45 minutes asking if they left anything in the rest room. Both times I gave them back.
The radios it was a different story. After one was under the counter for two days we called the shift seargent who came and retrieved it. I will bet that officer did not hear the end of it for quite a while.
No matter how many times you do it and nothing happens it only takes something going wrong one time to kill you.