The hell of it is, we don't know who's who. If we go by stereotypes -- assuming any woman or any senior citizen being "beaten" is automatically the victim -- we're on dangerous ground. There are senior citizens who have murdered police officers, and senior citizens who through everything from bad attitude to dementia have attacked others and had to be restrained. We, the witness, generally come in late and just can't make automatic assumptions.
It might be best to keep a distance, take cover, put a hand on my gun, and call 9-1-1 and loudly announce that I'm doing so, and take it from there.
Wishing there had been a more cut and dried answer I could have given you,