Patricia McGlone's mother's maiden name is listed on the certificates, and I believe that is how they probably identified her. The 9/11 victim they identified her to is of an age where you'd be looking more at a sibling or cousin than a child, and we're not sure she had a child. I don't think based on the info I found that you're looking at a sibling, though, this would have to be a somewhat more removed relative. While we know now who Patricia is, we still really don't know the date-- even approximate-- of death, right? I've been assuming 1969, but really, that's not necessarily a given. I'm still positive that has to be an SK. Angry boyfriends and pimps would dump a body in a field and get out of town, not encase it in concrete-- although anything is possible.
If death occurred later into the 80s, you'd start looking at people like Rifkin & RH. If 60s, 70s, Cottingham or someone like him, but with some propensity for concrete, which I don't think I've ever seen associated with Cottingham. One incredibly weird but fascinating note here: Rodney Alacala. He was working with Cottingham at Blue Cross I think Empire location in-- 1969. In 1971, he murdered a TWA stewardess who was living a block down from the apartment listed for Patricia's father on her birth certificate, in Yorkville. If working at Empire Blue Cross, he'd be easy walking distance to the location of where Patricia's body was found at 301 W. 46th St. Cottingham would have been as well, and that was actually part of Cottingham's stomping ground. It was like a 7 minute drive from where they worked. The thing about Alcala is, I can picture Alcala at "The Scene," he'd have fit right in, he's Studio 54 material. When I looked through a vault of photographs Alcala had taken of people (police fear at least some of these people are probably dead), there are two or three photos of a girl in what may be a "clubby" atmosphere with the same brick background you see in "Scene" photographs. The thing is, though, do we really think a murderer came back pouring concrete in a club that was still active and operational? This had to have been after it closed its doors in 1969. And there are apartments up above that club, maybe they were in some way involved. The concrete is where it gets very strange, and RH would know how to do this, Rifkin probably would through landscaping, but I can't picture these others mentioned actually pouring concrete.
There are all kinds of directions to go in. Hopefully, we'll find out more about Patricia and what happened to her.