Willis Wyche, 37, was last seen by a family member on June 5, 1999, in Lake Charles, Louisiana. He lived alone in Breaux Bridge and frequently visited his mother and sister; he had a history of bipolar disorder and did not always take his medication, but his family said he was not suicidal when he disappeared. He was described as 6 feet 1 inch, 185 pounds, bald with brown eyes and a scar on his right eyebrow.

On the morning of June 7, 1999, his 1998 pickup truck was found submerged at the Nelson Road Boat Launch near Black Bayou, about two miles from his sister’s home. A body shirt and a pair of black shorts matching what Willis had been wearing were discovered on the bank. A search of the area turned up no sign of him.

What information or memories might help explain how Willis’s truck ended up in the water and where he went after June 5, 1999?