It sounds like it would be a good idea to talk to a lawyer. It's already obvious that things will go badly and right or wrong, your employer may sue. Make sure

It sounds like it would be a good idea to talk to a lawyer. It's already obvious that things will go badly and right or wrong, your employer may sue. Make sure you're prepared for it (I am not a lawyer, that's why I suggest you talk to one). Then give your boss your two weeks notice, be very polite but don't go int details. Staying longer, trying to be the nice guy, will only result in disaster.