I do remember this guy. The sketch of the other guy is interesting, he's bald it appears. The genital mutilation, though that's a whole nother thing. That makes me thing it's unrelated. Plus it seems like the torso was dumped in the garbage the picked up which is how it was found at the sorting facility. The head was dumped in a public place. I'm going to go ahead and rule that one out, I don't think it's the Butcher/LISK.
As for Erica McDaniel, 2 miles in Brooklyn doesn't really mean anything at all. But how did you find Erica's address? Or are you think of 174 Hull where she was dumped?