[JRios1968]

As the airplane is flying, two F-106 are dispatched to follow it, but it flies at Mach 2.

Uh...there is NO WAY the Boeing 727 can break Mach 1, let alone Mach 2.

Unless, of course, it's diving straight down, at full power, from 80 thousand feet...

[SunkenCiv]

His real name is unknown, his age is unknown.

http://www.crimelibrary.com/criminal_mind/scams/DB_Cooper/index.html

"In either case, D.B. Cooper's nom de crime—no one knows his real name—may be the most recognized alias among western felons since Jack the Ripper."

[Vision]

Years later a hunter found some part of the plane in the vast northwest's woods. My take is he parachuted into the woods and moved to Florida.