I am so sorry to read about your marital crisis, WC. What he is doing is illegal and you need to report it to the police. They can make a forensic investigation of what was done to your computer system.

Take care of yourself. Do you have some people to help and support you? You have to protect yourself against the possibility of it even getting worse too. If he gets away with this then it is possible for him to escalate. Please be careful. We are all thinking of you and hoping for a safe and swift resolution.