The identity of masked Islamic State militant "Jihadi John" was revealed on Thursday. But what we have since learnt about Mohammed Emwazi throws up as many questions as answers.
Mohammed Emwazi grew up in Shepherd's Bush and Queen's Park, areas of north west London that have had a long and uncomfortable history of radical extremism. Channel 4 News looks back.
The British man identified as the Islamic State fighter, believed to have beheaded several hostages, was a popular schoolboy who loved Manchester United and S Club 7.
A friend of US hostage Steven Sotloff, who was murdered by Islamic State militants, says that family take some comfort from having a name for the "masked face they have seen in their nightmares".
How did the alleged identity of Islamic State's most wanted suspect fall into the public domain on Thursday morning? And where does the UK go from here in the fight against Islamic State?
It looks terrible - vandals of the Islamic State attacking ancient Assyrian statues with sledge-hammers.
It is understood that the security services have long known the identity of the man dubbed Jihadi John. On Thursday they have faced accusations that MI5 tried to recruit him before he left for Syria.
Eddie Ray Routh is sentenced to life in prison without the possibility of parole after being found guilty of murdering Navy SEAL Chris Kyle and his friend Chad Littlefield.