What investigators should of done to solve this case of D.B Cooper
This case has never been solved, and mystery skydiver never found.
What investigators should of done to solve this case.
1. They should have investigated all aboard that flight to make sure no one collaborated with 'Cooper'.
Cause there's a good chance Cooper never jumped, and only pretended to, then changed back into disguise, maybe a wig, maybe as a woman.
Or he could of hidden in storage crate. Since no one actually watched him depart the airplane, there's a lot he could of done to stay aboard that jet, while pretending to have jumped, especially if he had one or several collaborators with him on that flight.