One of the US Army’s rising stars stands accused of obstructing an inquiry into widespread corruption and mismanagement of the Afghan forces he mentored. And if the charges are accurate, they could end the career of one of the military’s top officers.

Lt. Gen. William Caldwell IV, until last year the US officer in charge of training Afghan security forces, allegedly blocked a Defense Department inspector general investigation into a pattern of misconduct exhibited by the Afghan National Army’s medical division. Aided by his senior staff, Caldwell prevented that inquiry to spare his command embarrassment ahead of US national elections.