Well, I was born and raised in NYC. Left there in 1970 to go to college (didn't go back though). My parents lived in Queens until they passed away. We'd read about dead bodies found, but it was mostly due to the Mafia.
As per the media. It was easier to tell the public that it was the Mafia than admit the truth that there were lunatics who had been unleashed from asylums and depraved criminals roaming the streets.
Richard Cottingham, the "Times Square Torso Ripper"
https://allthatsinteresting.com/richard-cottingham
https://www.nytimes.com/2017/06/07/nyregion/unsolved-harlem-murder.html
https://www.nytimes.com/2021/11/04/nyregion/bones-cold-case-nyc.html
https://abcnews.go.com/US/human-remains-found-york-city-yard-date-back/story?id=61651359
https://en.wikipedia.org/wiki/Bag_murders