>> obviously, she knew what happened to him. >> or choose the truth. >> finally, we will find out what happened. maybe justice will be served. hello, and welcome to dateline. mike williams doted on his wife denise and their baby girl. the perfect husband. he had a successful career, cooked, and cleaned. friends joke they would love to have a mike williams of the room. suddenly, mike disappeared. was it a tragic accident? one of the people believed something more sinister was a play and would stop at nothing to uncover the truth. here is dennis murphy with secrets of lake seminole. lake seminole, one hour outside of the florida state capitol is deep south. fishing and hunting -- fishing and hunting country. the duck hunters are up before dawn. it was in the year 2000