My method:
1. Trust information came to me for a reason.
2. What's for dinner?
Keep focus on kid, my own healing and enjoyment of life. Life balance.
3. Pray, meditate and trust I'll know what actions to take in good, right timing.
4. Keep my intentions clear: protection of child. Other than that it's not my business. If a parent is not safe/healthy to be around, trust God to work through me and others to protect child.
Trust your gut. Trust your instincts. Fact finding missions are God things to me. If I'm suddenly inspired and things are flowing, go with it. If I get wrapped up in my mind in it, it's time to step back, let go, let God.
This is one of the areas where domestic violence help centers have helped me in vocalizing what I'm seeing, and refocusing towards to bigger picture of safety, protection and healing.
Keep posting. Keep working things out. Widen your support grid in whatever ways you're led to.