The same way with any other crime. Call the police. Present them with your complaint and evidence.
I dont think that will work. In 99% of the cases the police does nothing they write a report and thats all, they wont start an investigation.
If the funds are small then it's most likely a learning tax, so that next time be more cautious. If it's big then its better to do it, however i`m not sure if police is effective nowadays...
It all depends on how you define 'work.'
Police certainly will investigate, but they may not be able to find the perpetrators nor make you whole again after the fact. police are reactionary, not preventative.
The 'learning tax' is accurate. At the end of the day, no one is responsible for our protection except ourselves. If we allow someone to steal from us, it's our own fault for allowing them access, whether that be by insecure practices or misplaced trust in third parties. At the end of the day, it's our responsibility, obligation to ourselves and e are only accountable to ourselves.