Then call his wife and have her get a lawyer.
Armchair quarterbacking.
I believe you are correct. Sticking around, alone and unprotected, in an urban neighborhood is never an acceptable option if one prefers to remain alive and intact. Leave the area and contact the authorities as quickly as possible.
For a while I had to travel thru the not so great area of a African American city. A family friend and retired state cop said the same thin in anything happened.
Immediately call 911, advise the dispatcher of your location, what happened and that you fear for you safety and keep driving. If, er, when a mob starts to form, don’t stop.