So last night at about 2am I was awakened by my doorbell and someone beating on my door. My wife and I jumped up and I threw my pants on and grabbed my M&P, we got close to the door and could hear hysterical crying, we looked outside and saw a young girl, who turned out to be my neighbors 8 year old daughter. She was crying and kept saying, "someone threw a rock, call 911, mommy said call 911". I wasnt sure what was going on but thought that maybe someone was breaking into their house and something had happened. I wasnt sure what was happening but I grabbed a jacket and told my wife to get the girl inside, lock the doors and grab the shotgun. I ran down to the house the girl lived in and as soon as I got to the driveway I heard yelling and saw my neighbor had his girlfriend, the little girls mother, by the hair and was throwing her head against the wall and knocked her down. I stayed well back and suddenly heard crying, I turned and saw their 4 year old son sitting in the car, I ran back and got my wife who was on the phone with 911, I told her to grab the little boy and we got the kids into the house. I went out to look again and the girlfriend was sitting in front of the window and the boyfriend was yelling at her and I sat outside to make sure things didnt escalate again and waited for the police. I wanted to go in and do something but wasnt sure of the legal implications of me going into someone elses house in the middle of a dispute and trying to break it up, especially since he was drunk. I kept my eye on them until the police arrived and settled the situation. I feel now that I should have done more, I should have stepped in, but I dont know enough about the laws regarding domestic violence to know if I would be justified in interveneing. I just knew I had to protect the children, the girlfriend is safe, I let her borrow my truck and she hauled her stuff, what stuff the police would let her get, to a safe place. It was a tense situation but I feel that under the circumstances I did ok. I just wish I could have done more. No child deserves to be in the middle of that, if you want to beat up on each other, swing away batman, but leave the kids out of it.