Does that store have a head office? You could contact them and tell them that you feel that you are being purposely ignored by the manager? Regarding the missing money you should go to your local police station and tell them about it, getting something written down that can be later submitted in a court will make you feel better, and who knows maybe this man has previous complaints about him on record and your statement may well prompt the police to actively look into it? If this is not the case then perhaps in future your filed statement can lend credence to another's complaint regarding him.
It is very tempting, but try very hard to be even more trusting with people after this incident. If you close down and start thinking that nobody can be trusted you will start seeing evidence for this everywhere, for what we concentrate upon we get more of in our lives. In other words 'Energy flows where attention goes'.