"The greatest tragedy was Genie being abandoned after all the attention," he said. "She disappointed the scientists, and they all folded their tent and left when the money went away -- all except Susie."
Today, none of the people who spoke openly to ABCNEWS.com know what happened to Genie.
"I have spent the last 20 years looking for her," said Curtiss. "I can get as far as the social worker in charge of her case, but I can't get any farther."
But one person who has researched Genie's life told ABCNEWS.com that he had located her through a private detective about eight years ago. That person, who wishes to remain anonymous, said that at that time, around the year 2000, Genie was living in a privately run facility for six to eight mentally underdeveloped adults.
"I got ahold of the accounts of her expenditures -- things like a bathing suit, a towel, a hula hoop or a Walkman," he said. "It was a little pathetic. But she was happy."
Kelly Weedon, a 23-year-old student at the University of Greenwich in Britain, has spent eight months researching the case for her English dissertation. She is flying to Los Angeles in June to view the special collections at UCLA, where Genie's story is encased in 37 feet of boxes that hold medical records, videotapes and legal files, as well as Genie's artwork.
Weedon is studying to be a special education teacher and has forged relationships with most of the players in Genie's drama.
"I truly believe that all the doctors who worked with Genie did the best they possibly could," Weedon told ABCNEWS.com. "But it was charged with emotion. In the end, they were crucified for it. But they would have been crucified, whatever they did."
In her meticulous research, Weedon learned Genie's real name and, "without too much more investigation" could find her -- but has decided against it.
"It wouldn't be fair," she said. "It would be too invasive, and she isn't the same little girl when the stories were written about her. I wouldn't do it -- for her sake and her memory."