Friend problems

My best friend since 1st grade was recently in an ordeal where her bf and her got into it i still dont know what about yet but he held her hostage wouldnt bring her home and beat her. During all this he took her phone so nobody could contact her was on her fb posting pics like he did nothing wrong still calling her is wife and my lady. First he goes from im sorry to shes a hoe and deserved it hes craxy hes literally post non stopped about her. We got her back home and she told me she was done and pressing charges. I have no idea what this was about til she is ready to talk. But she hasnt deleted him from her facebook or instagram she deleted some post but not pics and hes still tagging her, i have a feeling shes not done. Because my mom was abused by my dad i dont take this lightly so im upset and told her if she goes back she can contact me if she needs me but i can no longer mess with here or be around you cause its no ok , am i wrong?