During his two months in Maghaberry, Mr Duffy had two episodes of self-harming, periods of supervised medication and failed a drugs test.

BBC: Maghaberry prisoner died from 'drugs cocktail'

There must be a way that accountability kicks in when you have a scene involving a squad, then - and the accountability cannot be supervised by someone from that squad that has a self-interest in terms of their own career to protect their unit.

NPR: Sharpton Urges Action After Fatal NYPD Shooting