attorney richard callahan is intrigued by those old records that are surfacing. >> that began to paint a different picture from what zella price was saying. >> reporter: so you began to see some discrepancies? >> well, the records were certainly contradicting the story. >> reporter: then he uncovers an explosive contradiction. one that will shake the stolen baby story to its core. >> new documents that call one mother's account into question. >> reporter: callahan releases diane's birth certificate, and take a look. it says she was born at city homer g. phillips as >> you sort of think, well, stealing ring running out of homer g. phillips, if the baby wasn't born at >> reporter: the bombs keep going off. >> you came here, your water had broke? >> yeah. >> reporter: coming up, time for tough questions. we bring zella back to the scene of the alleged crime. she's defensive and defiant. >> why are they doing this to me? >> reporter: when "20/20" continues. why put up with that? but the quicksilver card from capital one likes to keep it simple. real simple. i'm talking easy like-a- walk-in

attorney richard callahan. >> if true, it was, it was something terrible going on at a time that nobody knew about. >> reporter: meantime, watkins could be on the verge of another reunion. >> hi, my name is al watkins. >> reporter: on the line with him, 47-year-old tanya montgomery, a mom of seven, about to receive a bombshell. >> we think we have identified you as a potential child of one of the mothers. >> and i said, what? >> reporte tanya has no reason to believe she was adopted. but is open to looking into the possibility if it would help one of the mothers. >> therere are onltwo babies that were born at homer g. philips hospital on may 30, 1967, and one of them was you. >> reporter: could tanya be the long-lost daughter of otha brand, a woman we met earlier? >> he told me that it could be a possibility that i could be her child. >> i just believe that she is my daughter. it's just too many coincidences. i just feel that it is. >> reporter: notice any striking similarities? they do. so they agreed to meet in person, while we at "20/20" commission a dna test. >> looked like we have

attorney richard callahan began an investigation. >> if true, it was something terrible going on at the time that nobody knew about. >> reporter: but "20/20" conducted its own eight-month investigation examining hospital records that tell a different story. the results stunning. >> this sounds like, what, the >> the only mystery is why the allegations were made to begin with. >> reporter: for "good morning america," deborah roberts, abc news, new york. >> some pretty outrageous claims. can you imagine? >> absolutely not and the way they did that story, i now really feel like i have to watch the show tonight. >> i know. "20/20," we do want to mention as deborah said they actually conducted a month's long investigation on zell's story as well as the claims that babies were sold out of the parking lot including dna testing, another possible long lost mother mother/daughter reunion. tonight at 10:00 eastern, 9:00 central right here on abc. it's a show you don't want to miss. >> absolutely not. >>> we want to say coming up new video of that hero medical student shot trying to represent rescu