When Nigeria’s military claimed Boko Haram leader Abubakar Shekau had been badly wounded in an air strike 2016, the jihadist chief soon appeared in a video to deny another of the many reports of his impending death. Over the weekend, it was an audio from a rival jihadist group finally claiming Shekau had died, detonating explosives to kill himself rather than surrender after a raid on his forest stronghold by his Islamic State-allied enemies. The Boko Haram warlord’s death marks a major shift in Nigeria’s conflict, potentially allowing ISIS jihadists to consolidate and further challenge an already stretched army in their long war. In the audio obtained by AFP, a voice apparently of Islamic State West Africa Province (ISWAP) commander Abu Musab Al-Barnawi confirmed Shekau killed himself whi...