Among the issues under consideration is whether officers followed Department of Justice guidelines, including identification requirements, deployment of chemical agents and use of force.
The investigation was announced amid the ongoing unrest in Portland, where Mayor Ted Wheeler was gassed by federal agents as he stood outside the courthouse.
WATCH | Mayor Ted Wheeler among teargas canisters in Portland:
Local authorities in both towns complained that the presence of federal agents exacerbated tensions in the streets, while residents accused the government of violating their constitutional rights.
Civil unrest escalated in Portland after federal agents were charged with taking people in unmarked cars without probable cause. And in Washington, peaceful protesters were violently kicked from the streets by federal agents using tear gas.
The decision to send federal agents to US cities comes at a hyper-politicized time as Trump prepares for a new re-election strategy after the COVID-19 pandemic shook the economy, dismantling what his campaign had seen like his ticket for a second term.
Trump took advantage of a moment of growing violence in some cities, saying it will only increase if his Democratic rival Joe Biden is elected in November and Democrats have a chance to make the police reforms they have. approved after the murder of George Floyd and the nationwide protests. demanding racial justice.
The federal response will likely be a major topic of discussion next week when Attorney General William Barr appears before the House Judiciary Committee for a hearing.