Did a second ISIS militant kill James Foley?
The shocking video of James Foley being beheaded in Syria has set off multiple investigations into the mystery of who killed the American journalist.
A day after the British ambassador to the United States said that experts in his country are close to identifying the killer, two U.S. law enforcement officials told CNN that counterterrorism experts are still unable to ID Foley's executioner.
U.S. analysts said it's not knowable from the video released by ISIS who carried out Foley's killing, because the entire slaying is not shown. A man moves a knife across Foley's neck, then the picture fades to black.