After an eyewitness sees a suspicious car parked in a truck stop near Frederick, Maryland, state troopers cordon off the area and a multi-jurisdictional SWAT team is flown to the scene. A dangerous mission takes place during the pitch-black morning.

Check out the latest true crime podcast from Tony Holt and the Arkansas Democrat-Gazette: 

"The Devil of Pope County: America's Worst Family Massacre". 

Visit arkansasonline.com/podcast23 for an exclusive subscription offer available only to podcast listeners.