Your bro should have put a freeze on the bank account when his card went missing, but he didn't, so TS.

For anyone to acess that account by machine, they need the PIN number, so I'm guessing your brother also released that info...? Which again, is not very smart.

Your bro fucked up, by being careless with his bank card, and I'm pretty sure he gave out his PIN number as well, because how else would they acess his banking info.

There are shady, fucked up people out there, but all of this would have been prevented if your bro would have kept that bank card in a safe place and kept his big mouth shut about the info. The only way to prove who is going to the machine and taking it, is by asking the bank to see video tapes of the ATM withdrawls. Most banks have a little camera in the ATM machine, that way, you can see who really did it. Not hard ot trace. Just look at your bank statement, see what date/time withdrawls happened. Look back on the tapes (if they allow it) and see exactly who did it.

That is harsh that someone would do that, but a thief doesn't really care. All they care about is their own well being.

Tell your bro to put that card in a safe, possibly, locked up place. I have a fireproof safe with key and lock for my important stuff, and there is no way in hell anyone can get in there.