JIHADI John was unmasked hours after releasing his initial ISIS execution video after British spooks recognized a veins in his knife-wielding hand.
Analysts during GCHQ also complicated a sheltered voice with wiretap recordings and fast identified him as Mohammed Emwazi from London.
Robert Hannigan, a former executive of GCHQ, a British signals comprehension agency, told a Sunday Times: “We had a competition to find out who he was his size, his hands, but, above all, his voice, done identifying him utterly easy.”
One jump was recognising a voice in a video, that was expelled on Aug 19, 2014.
But GCHQ sound analysts worked their sorcery after they used record to compare a twisted voice with that of Emwazi whom confidence services had been tailing for 3 years after he fled a UK for Syria.
Veins on his hands were compared to an repository of photographs and found to be a match.
Jihadi John initial emerged in Aug 2014, featuring in a array of ill videos expelled by a barbarous nonconformist group.
He was partial of 4 British jihadis who were nicknamed a Beatles.
In a clips he was filmed beheading several western hostages including dual Britons, David Haines and Alan Henning.
Despite his efforts to sojourn invisible, such as regulating encryption programmes and wiping each mechanism he used to send messages, British comprehension rescued him when he contacted his mother and child who lived in Iraq.
The insane was afterwards tracked down and killed by a US workman strike in Nov 2015 in Raqqa, in Syria.
He had been walking along a square, that was during a time a collateral of a contentious Caliphate, when a barb blew him to bits.
US Colonel Steve Warren pronounced during a time: “I watched a video when we killed Jihadi John.
“We found him when he was alone on a street, when he was articulate on a dungeon phone.
“And when it was all over, he was a greasy mark on a ground.”
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