I think the mayor was a Republican.
Completely different world.
That was 1985 and the people in the house were members of MOVE, an anarchist / animal rights revolutionary cult group that had, years before in ‘78, killed a police officer during a firefight over being evicted. Nine were convicted in the killing of the cop and received a 100 yrs each; not sure if they are still serving time or appealed, etc. They believed in communal living and were against technology [except guns, of course] and as I recall it was probably their habit of living in squalor with animals, and blasting the neighbors at all hours with recorded communist screeds at full volume, that led to complaints that brought out police.
The year was 1985 - not the 1960s.
And, the mayor was a Black Democrat.
You’re thinking of the 1985 MOVE bombing under black Democrat mayor Wilson Goode.
https://en.m.wikipedia.org/wiki/MOVE#News_media
The mayor was Wilson Goode, the first black mayor of Philly; he was a Democrat [which probably explains why no one was held accountable.]