About America Unearthed Season 2, Episode 12 :

When Scott Wolter gets a call from his friend John DeSalvo, an avid collector of Abraham Lincoln memorabilia, he has no idea that he's about to embark on a quest to learn whether there were a lot more people than just John Wilkes Booth behind the assassination of one of America's most influential presidents. Evidence Wolter uncovers suggests Booth was part of an infamous group of Confederates who formed a secret society called the Knights of the Golden Circle; a group that included influential politicians and rogue raiders like Jesse James. The evidence Scott complies suggests a new twist on the motives behind Lincoln's killing, and takes him on a wild ride through the history of the South at the time of the Civil War as seen through the eyes of the Knights of the Golden Circle.