This is somewhat off topic and not a nice thought, but it's something that really bothers me in relation to this case.
When I grew up on Staten Island, there was so much more open space. My street, for example, was 2 blocks long, with big empty lots at each end. (It is now a busy street that intersects two major streets, from what I've heard)
I can remember probably somewhere around 1978, we (my family) were coming home from somewhere and my dad took us on a detour. He took us to this big old abandoned farm somewhere on the island (no idea where) that was owned by his great uncle. I guess the uncle passed away and had no children so the farm just sat there for I'm not sure how long, but it looked abandoned and dilapidated. I really wanted to get out of the car and go look at the house and walk around but it was getting dark and my parents wouldn't let me.
It just seems that there were so many places back then where someone could be buried.
I went back to Staten Island briefly in 1990 for my dad's funeral, and barely recognized my old neighborhood. The empty lots were now houses, condos, sidewalks and paved roads.
I just really hate to think that missing persons could be under all the construction growth that happened on Staten Island.

I really wish Sylvia's case had been investigated more thoroughly back then.