In 1985, a Kansas serial killer believed to have murdered at least 10 women in two states killed Lisa Stasi, a 19-year-old mother whose body has never been found. Until 2000, investigators were flummoxed as to what happened to Stasi’s 4-month-old daughter, Tiffany, with whom the young mom had left the night she was last seen.
The truth turned out to be shocking.
This Friday on ABC’s20/20, co-anchor Amy Robach sits down with Heather Tiffany Robinson, who was 15 when she learned that her adoptive dad was the brother of the man who killed her mom.
They renamed her Heather.
Investigators believe that Heather’s adoptive parents had no idea John — a father and grandfather — was a cold-blooded killer, or that they knew of the horrific truth behind how he came to possess the infant girl. Heather’s interview with20/20marks the first time she has spoken about her ordeal. (The two-hour episode airs Oct. 4 at 9 p.m. ET, on ABC.)
“No, it made it worse,” Heather said. “Everything I had fantasized and created about Lisa was completely taken away.”
Robach, in an interview with PEOPLE, says, “Heather surprisingly wasn’t shocked to hear of John Robinson’s crimes. She says she always got an uneasy feeling from him growing up.”
ABC

A jury convicted John of three murders in Kansas and he was sentenced to death. John also pleaded guilty in Missouri for the murders of five more women, receiving five life sentences without parole.
John Edward Robinson.Kansas Department of Corrections

John, who sits on death row in Kansas, has appealed his sentence in that state.
The remains of two other women John has claimed to have murdered have never been recovered.
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Heather isn’t the only interview featured in the20/20special. The program also includes segments with Donald Robinson, John’s brother, and Heather’s husband, Roberto Ramos, who is helping his wife investigate Lisa’s past.
“Becoming a mother inspired Heather to search for answers about her birth mother and her early life,” says Robach. “Heather’s dedication to finding out more about her mother — how she lived and how she died — is inspiring and heartbreaking at the same time.”
20/20airs Friday, Oct. 4 on ABC at 9 p.m. ET.
source: people.com