Basheer was a young Taliban fighter barely out of his teens when the Islamic State group took over his village in eastern Afghanistan, nearly eight years ago. The militants rounded up villagers identified as members of rival extremist group the Taliban and killed them, often beheading them, forcing their families to watch. Basheer escaped and lived in hiding during the following years when IS controlled several districts in Nangarhar province. Over time, he rose in the Taliban ranks. Now known as Engineer Basheer, he is the Taliban intelligence chief in eastern Afghanistan, with a leading role…