Complex sentence: The standoff between Boyd and police forces lasted about four hours, with Boyd making a variety of claims including that he was on a mission for US Special Forces, and could kill all of the officers present with one phone call.
Split into simpler sentences: The standoff between Boyd and police forces lasted about four hours. Boyd made a variety of statements, including that he was on a mission for US Special Forces, and could kill all of the officers present with one phone call.