Man implicated in 'D.B. Cooper' skyjacking had worked at Boeing

One of two brothers implicated by a niece in the 40-year-old "D.B. Cooper" skyjacking case worked at Boeing around the time of the fabled incident, according to the woman's mother

Marla Cooper told ABC and other news media that her father, Donald Cooper confirmed L.D.'s role in the skyjacking, and swore her to secrecy.

"A week after the incident, I went to my dad very secretly and said, 'Can I tell this at show-and-tell that uncle L.D. hijacked an airplane, that he's a hijacker?'" she tells The Oklahoman. "And he said, 'No, of course, you can't.'