The 50-year-old cold case of D.B. Cooper may have seen a new development after an amateur sleuth claims to have found the parachute used by the infamous, yet still unidentified plane hijacker.

Aviation YouTuber Dan Gryder, who has seen the parachute, believes it's the one ... a similar hijacking in Utah five months after the D.B. Cooper incident. He was sentenced to 45 years in prison ...

A man who discovered the parachute believes a man who executed a similar hijacking was D.B. Cooper Federal Bureau of Investigation D.B. Cooper A parachute that might have been used by the ...