In the "Unsolved Mysteries" segment (seen below), they used the actual schoolhouse where Dennis was spotted disposing of the bloody sheet. Marilyn's body was found a few miles north of the school, buried behind the old church.
Instead of giving himself up, Dennis committed suicide in order to avoid capture. The night the case was featured on “Unsolved Mysteries” on March 20, 1991, Dennis was watching the episode at his new home in Dallas and was going by the name “Hank Queen.” He tried to flee, but after a high-speed chase that went into Mississippi, police caught up with him after disabling the speeding van. They attempted to get the van’s license plate number to no avail. A brother and sister were out driving past the schoolhouse, and they happened to see Dennis unloading the blood-soaked sheet from the van. He then drove south to the schoolhouse to dispose of the bloody sheet. Dennis shot her in the back of the head, wrapped her body in a sheet, threw the body into the van, and dumped her behind an abandoned church.
Angry and hostile, Dennis beat her right in full view of their three children and coaxed her into going with him in their van, stating he wanted to go to the hospital. Thanks to a marriage that became loveless and constantly argumentative, Marilyn filed for divorce.
Coldwater high school counselor Marilyn DePue disappeared on Easter of 1990, and neighbors immediately pointed a suspicious finger at her husband, Dennis.