Fred,
That is probably the right time frame. He was in the streets, trying to keep order, and suffered abuse from the locals.
K51
It got worse and worse over time. In the early/mid-sixties they had poor whites in one part of the complex, Pitt students and grad-students in another, Puerto Ricans in another, and Blacks everywhere else.
I went back there a few times to see unfortunate friends who were still living there as late as 1972. They were constantly harassed. In most of the rest of the 'Burgh people get/got along pretty well.
No doubt the constant agitation will eventually make every city a hell-hole. Still, of the places I've lived in PA; Philly, Allentown, Harrisburg, York, and Pittsburgh, Pittsburgh was by far the most harmonious.