Nora Heart Trial on 20/20

DAVID MUIR - 20/20 HOST: "She is a young woman despised by many viewers of the hit series Supernanny on Lifetime, and many Americans are shocked at her toddler like behavior. And since she's behind bars, her family hopes that will be the thing to not only have her grow up, but also change her for the better. Tonight, a revealing interview with Supernanny host Gloria Robinson. You may remember when Robinson was shot three times and later hospitalized while filming an episode of the show and helping a family with an out of control teenager. Many still wonder, what would cause a 17-year-old to try to do this to someone who just wanted her to change her ways?

At the ripe young age of 23, Robinson wanted to be a world-renowned childcare expert. And earlier this year, in an incident that nearly took her life, she became a household name. Robinson, who started hosting Supernanny after the retirement of Jo Frost, was hospitalized at the hands of the teenage daughter of a family she was trying to help, the young woman you will meet now. What happened? Only one person knows for sure. Cecilia Vega brings you her story."

CECELIA VEGA - ABC NEWS REPORTER: "17 year old Nora Michelle Heart is beginning a life behind bars. Two months ago, a jury found her guilty of the failed murder attempt on Supernanny host Gloria Robinson, as well as other charges including Arson, and Animal Cruelty. She was given a life sentence, with a chance of parole for good behavior in 2040.

Heart will be the first female prisoner at the Federal Correctional Complex in Butner, North Carolina; long a men's correctional facility whose most notorious prisoner is the late Ponzi schemer Bernard Madoff. She will be held there under heavy guard, isolated from male cellmates. She lashed out at the entire courtroom while testifying. Now recovered but still hospitalized, Robinson decided to tell us her side of the story from her hospital room at the Los Angeles-based Cedars-Sinai Medical Center. We hope to make sense of an unexpected incident that shocked fans and viewers of the show."

GLORIA: "That girl was mentally unstable, there was no doubt about it. Snorting cocaine the moment I walked in the door, I knew I was going to be in for a wild ride. But never did I expect her to have a gun and shoot me."

VEGA: "Robinson, a 23 years old New Yorker, says she's lucky to be alive after being shot at the hands of Heart. A graduate of Princeton University, she started hosting Supernanny after the retirement of one of her biggest influences, British childcare expert Jo Frost."