In 2003 a ring of Italian thieves pulled off what was known at the time as the largest diamond heist in history, walking away with over $100 million in stolen goods. The heist was unprecedented at the time, and the diamonds have yet to be found.
Thieves were able to penetrate an underground vault in Antwerp, Belgium, and successfully disarmed ten layers of security. Authorities believed the heist was done by the best of the best on the top of their game. The investigation lead to the arrest of Leonardo Notarbartolo. An Italian thief who was picked up due to a garbage bag left in field close to the heist.
As the infamous story goes, when Notarbartolo, and accomplice Speedy where fleeing the scene of the crime, Speedy grew nervous and had a panic attack. Unable to go further they pulled to the side of the road, and Speedy dumped a garbage bag full of evidence in an empty field. When the garbage was found the next day by the disgruntled owner of the land, police inspected the materials finding amongst the clutter diamonds. Further forensic inspection of the bag led them to Notarbartolo.
Though no further evidence has been found actually linking to the crime he remains in jail.