Interesting discussion of the D. B. Cooper mystery in Pub Talk section of this forum at: http://forum.casebook.org/showthread.php?t=10076
Facts I've recently learned:
"D. B." is incorrect, the hijacker flew under the name "Dan Cooper"-- which was also the name of a character in a French-language comic book about an adventurer who was depicted as jumping from a plane with two parachutes. It was a popular publication in French-speaking Canada in the 1970s.
Tests of the clip-on tie left behind by "Cooper" revealed traces of a rare material probably left behind from the manufacture of (or work with) CRT screens, which may narrow his occupation down.
Some people think there is a possibilty that the plane changed course enough that "Cooper" would have jumped into high desert, not thick forest-- in which case, he could well have survived.
: Jack the Ripper plays shuffleboard. -- Happy Birthday, Wanda June
by Kurt Vonnegut, c.1970.