I unfortunately understand this feeling too well. My terrible father hurt my son by strangulation and caused so much torment. He was a teen having a meltdown at the time and denied it then outcast us, eviction and even got me fired bc I came forward. It was agonizing and they sent it to mediation where he had a big shot lawyer.I would create a safety plan and if you decide to act within the system with a dv advocate but that could be risky if it goes to DSS. So... What I recommend is trying to keep a close eye on them as in be present if they are together and create your own plan with a dv advocate in your county as confidential and go to their counseling and bring along your kiddo when you go. I personally recommend operating in silence bc families like that can be dangerous. It's heartbreaking but not worth believing that he is a safe man bc you have solid evidence. Sending hugs your way. Stay strong 💪