It is a violation of criminal law because terrorists kill innocents. To kill another being is against the law.
When partners representing multiple jurisdictions and agencies work together to establish the incident objectives, the Unified Command is being used.The Unified Command creates a single ICS structure with a built-in process for an effective and responsible multijurisdictional or multiagency approach an enables agencies with different legal, geographic, and functional responsibilities to coordinate, plan, and interact effectively.