‘Signs of radicalisation’ after Paris attack ringleader Abdelhamid Abaaoud left jail

Much about Abdelhamid Abaaoud’s path to armed Islamic radicalism remains mysterious.

In the words of Koen Geens, the Belgian justice minister, he changed from a student at an upscale Brussels school into “an extremely professional commando”, one seemingly able to slip across borders at will.

Someone who openly mocked the inability of Western law enforcement agencies to catch him.