The joint investigation headquarters of the Metropolitan Police Department and the Chiba prefectural police has decided to request cooperation from US and British investigative authorities to identify a man who appeared in a video purportedly showing the killing of Japanese freelance journalist Kenji Goto.
The joint investigation headquarters is likely to put the man, if identified, on an international wanted list via Interpol.
The man appeared in an online video released on Jan. 20 in which Goto, 47, and Haruna Yukawa, 42, appear to kneel in the desert and the man demands a ransom of $200 million. The man also appeared in a video released on Feb. 1 on the Internet that purportedly showed the killing of Goto. In the videos, the man is dressed head-to-toe in black and is holding a knife. His face is almost entirely covered by black cloth.
Goto and Yukawa had been taken hostage by the militant group Islamic State of Iraq and the Levant (ISIL).
The National Police Agency's National Research Institute of Police Science has recently examined the voiceprint of the man, who was speaking English in the videos. The institute concluded that the man's voice is identical to the voice of a man who appeared in videos showing the killings of US journalist James Foley, and Alan Henning, a British man who was engaged in humanitarian assistance activities in Syria, as well as others.
The man, who has come to be nicknamed "Jihadi John," is alleged to have been a rap singer from western London. He was reportedly affected by the ideas of the radical Islamic group and went to Syria last year.