And most of the time, stories such as Barbour's do turn out to be concoctions, retired FBI investigator Keith Lanning told CNN.
"A lot of these individuals, particular some of the adult survivors, have emotional and psychological problems, and a lot of their motivation is to get attention and forgiveness for various problems in their lives," he said.
Some just want to try to cash in on a fragile connection to a case in hopes of working themselves out of trouble with the law, said Dyroff.
Whatever their motivation, it ends up leaving victims hurt all over again, Dyroff said.
"When you can't get any of those pieces to fall into place, it's very hard," she said.