Well, here's an easy one...just 'cause I happen to be listening to these gentlemen tonight...
One R&B hit single of the 1970's, according to urban legend, featured a scream effect that was reported to be the scream of a woman being stabbed, like, right there in the studio.
Gee, what a bunch of gullible kids will believe, eh?
Anyways, name the group and the hit single.