Missing Pearl Forensic Files : Season 6 Episode 2

In 1991, Maine resident Pearl Smith is missing after an argument with her husband Bill Bruns. Despite pleas from her children, police insist on treating it as a routine missing person's case. But, when an investigation turns up a blood trail that leads to the couple's basement, police are sure they'll find the victim's body. Initially, they find nothing and the case stalls, until new forensic technology helps investigators find the body. The investigators first use luminal over the cleaned carpet to reveal the blood spatter on the floor and a path down to the basement. Then, they use ground penetrating radar to scan the basement for radiation; they found three feet down, excavated rusted sand everywhere except in a certain area. The body had absorbed the rust and was found there.