I went back and re-read the piece (posting the link below) that mentions the woman who said she was there that day, shortly after the pic of Abby was posted. In it they quoted her as saying - “I even walked all the way across the bridge and back. I only (saw) a guy when I first got there and another couple once I got on the bridge,” . By "another couple" I wonder if she was just meaning people besides the guy she saw, or if she meant she was there with someone, as a couple too, but I guess either way, LE has probably already interviewed her.
http://heavy.com/news/2017/02/liber...ssing-snapchat-facebook-photos-family-bridge/
http://heavy.com/news/2017/02/liber...ssing-snapchat-facebook-photos-family-bridge/