On December 8, 1963, a group of amateur criminals hoping to strike it rich engineered one of the most infamous kidnappings in American history.

For several weeks, two 23-year-old former high school classmates from Los Angeles—Barry Keenan and Joe Amsler—had been following a 19-year-old singer from city to city, waiting to make their move. Their target: none other than Frank Sinatra, Jr., son of one of the most famous singers in the world, “Old Blue Eyes” himself. Their plan was bold but simple…snatch the young Sinatra and demand a hefty ransom from his wealthy father.

The pair decided to strike on the evening of December 8, 1963—just days after the assassination of President John F. Kennedy. Sinatra, Jr., just beginning his career in music, was performing at Harrah’s Club Lodge in Lake Tahoe on the border of California and Nevada. Around 9 p.m. he was resting in his dressing room with a friend when Keenan knocked on the door, pretending to be delivering a package. Keenan and Amsler entered, tied up Sinatra’s friend with tape, and blindfolded their victim. They took him out a side door to their waiting car.