Two Georgia men will spend the rest of their lives behind bars for the horrific murder of a homeless man found beaten, hog-tied, and anchored to the bottom of a lake, authorities announced this week.

In July 2023, John Andrew Mamph was all of 29 years old and living at an encampment in St. Mary’s — a small town located just north of the border with Florida — when he was attacked in a remote area known to locals as “Gilligan’s Island.”

During the attack, a large group of at least three and as many as four people took part in the beating, Peach State authorities allege.

“The defendants then transported Mamph to a nearby boat ramp where they put him in a boat and took him out on a lake,” the Brunswick Judicial Circuit District Attorney said in a press release. “While Mamph was still tied up, the defendants then weighed him down with multiple weights and dumped him into the lake so he would drown.”