Sorry - I don't see any 'tricky' in this 'situation'. That woman came out on her front yard calling for help. No one has to know you called. It warranted a call to 911. How would you have felt if you went out at night on your lawn calling for help with no one answering? Helpless, useless and not worthwhile. She was being beaten up. Not much chance for her to dial those three numbers is there!
I grew up in a home just like this. The entire neighborhood could hear my father beat the living shit out my mother - and I. The neighbors knew - cos I could hear it when I was outside on the street or in another house of a friend's, and at one time, we were asked to move.
Enough of this crap that the woman probably will or won't do this or that. You help! You call! It's bloody simple. Does Battered Wife Syndrome ring any bells? So she goes back - it's her fault? So you've been abused - you're not going to help, yet listen to her screams?
I was terrified of my father. At 14, I was the ONLY one to defend my mother and on many occasions, stop him from killing her. Was that easy for me? NO. But someone had to do it, and none of the so called adults in my world did a damned thing. I hate them for that.
There is NO tricky to this situation. You damned well call. If you need to remain anonymous, you say so and why. Also - this is NOT a situation where you call the police for disturbance of the peace. The police need to know, for their own safety that it is a domestic violence situation. They will often arrive with backup now.
That woman cried into the night. Little does she know that someone heard her and kept silent. How the hell would that make YOU feel?
Tricky my ass.
Mimilly