MOHAMMED AMIN, BEN PARKER and PAISLEY DODDS IN the wake of George Floyd’s death and the Black Lives Matter protests that followed, Catholic Relief Services told its staff it was launching an initiative to stamp out racism within the NGO, one of the world’s largest charities. Soon after, its American boss in Sudan sent staff a reminder for the launch. The same day – 28 July – he was arrested on a charge of verbal abuse for calling a security guard a “slave”.  The allegations of racism weren’t the first against Driss Moumane – at least three whistleblower complaints had…