CHEQUE BOUNCE

The case is not attract for cheque bounce. So you are option to firstly lodged complaint against them for misuse of cheques. so this helps for the further proceeding. If the father in future filed complaint against you in which you defend aganst them in court of law. 

The cheque bounce case will not be maintainable if the complainant could not prove legally liable debt 

However you can lodge a criminal complaint about loss of cheque with police and issue instructions to bank for Stop payment if the cheque is presented after that.

Have you signed the cheques that were stolen by them, if not then you don't worry about it.