Police said the body of a 51-year-old man was found in Lake Ray Hubbard Tuesday morning.
Dallas police said the victim, identified as Prince Slaughter, launched his boat into the lake at 7:56 a.m. Another person was on board with him.
At some point, Slaughter jumped into the lake and tried to swim back to the boat. A witness told police they saw him going under water and tried to save him.
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Police said the witness pulled Slaughter to shore, where he was pronounced deceased.