Next, the 4th, 5th, and 6th amendments to the United States constitution. Telling armed forces to shoot unarmed people because they happen to be looting (e.g. when there is no imminent threat to life) is summary execution and unconstitutional.
How about martial law, seeing as we're throwing around unrelated legal laws and concepts?
Either way, these ridiculous "protests" indicate a complete break down of society and the government should be sending in the military to arrest people.