Islamic State oil man Abu Sayyaf was riding high a year ago. With little industry experience, he had built a network of traders and wholesalers of Syrian oil that at one point helped triple energy revenues for his terrorist bosses.

His days carried challenges familiar to all oil executives—increasing production, improving client relations and dodging directives from headquarters. He also had duties unique to the extremist group, including approving expenses to cover the upkeep of slaves, rebuilding oil facilities damaged by U.S. airstrikes and counting towers of cash.

Last May, U.S. Special Forces killed Abu Sayyaf, a nom de guerre, at his compound in Syria’s Deir Ezzour province. The raid also captured a trove of proprietary data that explains how Islamic State became the world’s wealthiest terror group.

Read more at Fox News

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