Marla Cooper (yes, Cooper) says she knows the true identity of "skyjacker" DB Cooper: His name was Lynn Doyle Cooper, known to family members as LD, and he was her uncle, Marla tells ABC News. She recalls a suspicious conversation between LD and another uncle she overheard as an 8-year-old while at her grandmother's Oregon home. They "were planning something very mischievous. I was watching them using some very expensive walkie-talkies that they had purchased. They left to supposedly go turkey hunting."
The next day the plane was hijacked, and LD arrived home "bloody and bruised and a mess," saying he had been in a car accident, she says. "I was horrified. I began to cry. My other uncle, who was with LD, said Marla just shut up and go get your dad." She says she also heard her uncle say "we did it, our money problems are over, we hijacked an airplane." Except much of the money was apparently lost, and she says her uncles wanted to search for it. She never saw LD again, and was told he died in 1999. Marla says she was the one who gave the FBI its "promising lead." She's also apparently working on a book on the subject, but says that's not why she's coming forward. (Read more DB Cooper stories.)