someone is stealing from the school change rooms, how can i catch them in the act?

Answer 1

legally? doubtful.

if you want it to be enforceable, you cannot violate legal procedure (setting up a camera, trap, etc.)

you could hide somewhere and observe - then act like you just happened to walk in, but then it will likely become your word versus the thiefs

I can tell you this, if anyone comes in and sees you're hiding - guess who they are going to think the thief is?

Answer 2

In some countries, there are bathroom and locker monitors.

But in our very homophobic societies, it is unlikely we'll go there.

Maybe the best strategy is a combination of theft prevention, including better locks, not bringing valuables into the lockers, with search warrants on suspects, checking pawn shops, marking bills, even chemically tagging currency.

Answer 3

Put a small mouse trap in the pockets of your clothes. The person with the welts on the fingers will be your crook.

Answer 4

It's not your job to catch them. If something from you personally was stolen, tell the principal.

Answer 5

Hide in there, or if possible, set up video surveillance. Better still, lock them so no-one can get in there alone

Answer 6

Hide in one of the lockers .