NEW You can now listen to Fox News articles! When Timothy Jones Sr. learned his grandchildren were missing, a deep, unshakable dread set in — he feared his own son had killed them. "I remember I told my wife, ‘I know he’s killed them,’" the patriarch tearfully recalled to Fox News Digital. "I just don’t know where they are. But I know he has. I just know it in my heart. I could feel it." Timothy Jones Jr. admitted to killing his five children, ages 1 to 8, in their Lexington County, South Carolina, home in August 2014. He drove with their bodies in his SUV for nine days before dumping them in five garbage bags on a hillside near Camden, Alabama. JOURNALIST’S DANGEROUS OBSESSION WITH A FORGOTTEN SERIAL KILLER UNRAVELED HER REALITY In this Sept. 11, 2014 photo, Smith County Sheriff Charlie Crumpton, left, watches as Timothy Ray Jones Jr., is escorted by lawmen out of the Smith County Jail to a vehicle for transport to Lexington County, South Carolina.…