For anyone who may not be familiar with this case don't worry the article gives a short catch up on the event further on. A group of amateur scientists claim they may have narrowed the suspect pool in a case that has stymied the experts for decades. The infamous case of D.B. Cooper and the nation's only unsolved skyjacking has left investigators befuddled since a parachuted Cooper leapt from a Boeing 727 headed to Seattle from Portland on Nov. 24, 1971. But a team of "Citizen Sleuths" say that evidence they've uncovered could mean that Dan Cooper, the name used when the culprit bought his one-way ticket with cash, was in fact an employee of some sort of aerospace engineering firm. The crucial pieces of newly uncovered evidence: thousands of microscopic particles on a $3 clip-on necktie from JC Penney. "All of these particles are too small to be seen with the naked eye, but modern science can now track them to their source," the group wrote on their website. "These particles through