Somewhere beneath Lake Seminole, in the spot where tree stumps jutted out of the water like claws, investigators thought they would find Mike Williams.It was the evening of Dec. 16, 2000, the date of Williams’s wedding anniversary with his high school sweetheart, Denise. He’d told his wife he would return from his duck hunting trip at the lake just in time to leave for their planned getaway down in Apalachicola, Florida.