When faced with the opportunity to set a criminal free or kill them in cold blood, you instead chose the lawful route and turned them over to authorities.
You need to arrest Nasri, Shaheed, Surkov and Brayko. For Brayko, this means not Executing him, but not extorting him for cash either, and in the end, choosing the Spare option through which Mike scares Brayko with gunshots around him.