Pamela Smart Says She Wasn’t Behind Her Husband’s Murder

Pamela Smart is the former high school teacher at the center of a lurid murder case that inspired the Nicole Kidman movie "To Die For." At 22, she was accused of persuading her teenage lover to murder her husband by shooting him in their New Hampshire home. Her 1991 trial riveted the nation, and Smart was convicted and sentenced to life in prison without parole. Now, after spending nearly three decades behind bars for masterminding her husband's killing, she's opening up to ABC's "20/20."