An in-depth breakdown on the Londonderry Ping, a supposed cell phone tower ping by someone trying to call Maura Murray on the day she disappeared. Exploring the affidavit for a warrant requesting the identity of the caller, dissecting the truth behind the "Red Cross" call to Billy Rausch, Maura's boyfriend at the time, which he described as Maura herself, whimpering, as well as narrowing down the extent of involvement in the case by the FBI, and who called them off, and why, discussing the interplaying agencies of the New Hampshire State Police Major Crimes Unit, UMass Police Department, and the FBI.