On September 4, Eric Holder announced that the Justice Department will investigate Ferguson police force for possible misconduct or discrimination, saying that, "e have determined that there is cause for the Justice Department to open an investigation to determine whether Ferguson police officials have engaged in a pattern or practice of violations of the U.S. constitution or federal law."
9月4日，埃里克·霍尔德宣布，司法部将调查弗格森警方可能的不当或歧视行为：“（我们）已确认司法部展开调查，确认弗格森警方是否有违反美国宪法和联邦法律的模式和做法。