Operation Misty: The Undercover Sting That Caught a Serial Killer

10 Minute Murder | Bingeable True Crime Stories · Mar 10, 2026 · 13m

Operation Misty: The Undercover Sting That Caught a Serial Killer

In October 1997, the body of Samantha Class, a 29-year-old mother of three, was discovered partially submerged in the muddy foreshore of the River Humber near North Ferriby, England. DNA evidence pointed directly at suspect Gary Arthur Allen, but in a 2000 trial at Sheffield Crown Court, Allen walked free. Twenty-one years later, in 2018, Alena Grlakova, a 38-year-old mother of four from Slovakia, vanished from Rotherham. Her body was found months later in a nearby stream, strangled and discarded just like Samantha had been…