Two Men Sentenced to Life for 2023 Gilligan's Island Murder

Frank Kennedy and Anthony Mistretta were convicted and sentenced to life in prison without parole for the 2023 torture and drowning murder of John Andrew Mamph in a remote area of St. Marys, Georgia, known as 'Gilligan’s Island.' The pair, along with others, assaulted and hog-tied Mamph near his homeless encampment before transporting him by boat, weighing him down, and submerging him alive in a lake, where his body was discovered the next day by a jet skier. The investigation, aided by eyewitness accounts, led to swift arrests. Three other individuals—Debra Doughtery, Megan Robison, and Bernice McGuire—also faced charges, with Doughtery pleading guilty to felony murder and receiving a life sentence with parole eligibility after 30 years, while Robison and McGuire pleaded to lesser charges. The case was described by officials as a brutal, group-involved murder, with law enforcement and prosecutors crediting teamwork for the successful convictions. The sentences reflect the severity of the crime and the involvement of multiple perpetrators.