In my case, I had some insight in to the assailant's status, which also allowed me to feel some compassion. I have a background in psych. I'd made sure the assailant was arrested by following the person through 3 crowded city blocks. I'd wanted there a formal psych eval and, at least, treatment... or the person would stay where further harm could not be done to the general public. (This person took out 3 police officers while they were trying to arrest.)
My background in psych gave me insight and understanding I might otherwise not have had at the time. As I had gotten to know more of the background story, it was clear the local mental health system had failed this person in a major way and this person had became increasingly psychotic while on the streets 24/7. There were records of this person seeking help, repeatedly, and getting nowhere. It was a disaster waiting to happen.
I do not believe this person was at fault at the time of the assault due to psychosis. I feel strongly that community mental health services failed this person and the community.
A very unfortunate incident for both of us.

WC