There is no way to prove who took your items.
It is ultimately your responsibility, how can you be so sure that one of these two men took your items? Yes they may have still had your password but who's not to rule out you muled the items yourself and are only disputing these two people.
It's a grey area, it could be you or it could be them. If you have no further proof, this dispute will get closed in 24 hours.