O.K. Looking at this with fresh eyes there's alot going on. Possibly ways we can at least find something more on this girl.
Ummmmm, the fact this guy had so many wires all over it's a miracle he didn't set the place on fire. Also, I know it's NYC and all but he's pretty brazen as the people across the way had to be able to see in.
There's a newspaper on the floor to the right on the bottom. I also think he has a mirror and I can see him in it. He's a little sideways because the flash would have bounced off. Right between the two windows.
He's sloppy so I don't think the house he's in with the girl in the yellow bikini is his. Of course I also see a faint bruise on the top of her right kneecap. Judging from that letter he asked for photographs of the actress with a bikini on. If he couldn't get that he wanted bare legs.
So what he could whack them? It takes an awful lot to break a kneecap. I think he knew just how to hurt someone enough for them to suffer but still be fairly mobile. Sick. So possibly the newspaper would date this. I'm praying he didn't use all those wires and stuff to hurt these women.