I was looking through Jamaica Plain High School Yearbooks after I realized that they were available online thanks to a poster on 1976 Baltimore Jane Doe's thread.
Each yearbook online only has a senior section. I looked in the '81 yearbook and I found a picture of a girl with initials AS. I thought she looked quite a bit like our Ruthie, specifically the combination of NCMEC's recon and Carl's recon. She has the round face and dainty chin, eye color looks roughly the same, hair looks very similar. I can't see a scar on her right eyebrow, but (and this is a huge but) the photo *could* be flipped. I think the nose is off, it looks larger than Ruthie's little nose. But I thought I'd mention it just to be sure.
I think it's far fetched because I discovered a woman on FB with the same name, who seems like she *could* be her. This woman's account is pretty much all private--she has no visible info about high school, college, hometown, where she lives, etc. In her profile picture, she's next to a man and they're standing with arms laced. It seems like they could be married, at that age, so I was confused about her not changing her last name, though some women keep their maiden names.
Just thought I'd mention it, just to be on the safe side.