Last May, 22-year-old John Deselms of Tulsa, Oklahoma, drove a boat into a docked houseboat on Grand Lake.
Two passengers, Rachel Swetnam and Texarkana, Arkansas native, Trey Varner, both died.
Deselms admitted to drinking ten beers and a shot of tequila before the accident.
His sentencing is in December and faces four years to life in prison.
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