I remember this happened in a cemetary in Pawtucket,R.I
The reason why I remembered was because I knew the kids, they were about 4 years older than me,
and they were sorta the bullies of my side of town, They picked up a hooker in Central falls , and brought her to the cemetary, that is bordered by Pawtucket and Central falls , I guess they lured her there with cocaine, Anyways later on that night one of the kids ( i won't mention his name) Smashed a tombstone over her face.
And then the following day in the paper they actually had a picture of the females body with the tombstone covering her head, pretty disturbing. But anyhow I think you might have this incident confused with what happened in Pawtucket.