Yes, they broke laws and ethics to do it. Yes, they tried to cover it up, and lied while doing so.
Fire and prosecute every one of them who broke said laws. They give average people who unknowingly break of of their convoluted laws no mercy, so why should they get any?
Short version: if you want actual investigation before you label someone a rapist, you're a 'rape truther'.
Absolutely seriously: some people would look better dead, and Boko Haram is right at the top of the list.
As someone said, even the Nazis tried to hide a lot of what they did; these bastards brag of it.