1. We don't KNOW that the bad guy was choking the woman ... the original notice said the badguy had "his hand around her neck". That does not mean he was cutting off blood supply or air supply. I'd need to SEE the woman's face and body language to make a decision.
2. Homeless or not, this could have been a domestic dispute ... We've all heard examples in CHL classes about CHL holders intervening in a man/woman assault only to have the man & woman turn on the CHL holder.
3. Does the homeless guy have a knife or other weapon that I don't know about?
From what was presented here, I think it would be best to be a good witness and be standing by ready to take action if the conflict escalates.
