Democratic members of Congress are demanding answers regarding the vetting and training of Immigration and Customs Enforcement (ICE) agents following a report that the officer involved in a deadly shooting in Maine had a history of mental health issues and violent behavior. The Associated Press reported that David Brouillette, the ICE officer who fatally shot a Colombian national in Maine, is an Army veteran who has struggled with serious mental health issues since childhood, according to relatives.

Rep. Bennie Thompson, the top Democrat on the House Homeland Security Committee, stated that Brouillette’s reported history and the death in Maine "directly call into question the supposed vetting and training ICE does of its recruits." Thompson called for an investigation and for the officer to "be taken off our streets and face justice for his actions."

Senate Democratic Leader Chuck Schumer commented that the consequences of inadequate oversight of ICE are now being measured in lives. He asserted that the "Trump administration rushed 12,000 agents onto our streets without ensuring they were fit to carry a badge and a gun" and that "Republicans gave this rogue agency vast power and no accountability."

The report about Brouillette’s past emerges as the Department of Homeland Security is engaged in a significant hiring surge, supported by funding from Republicans, to implement President Donald Trump's deportation agenda. This raises further questions about the department's processes for quickly hiring, vetting, training, and deploying agents nationwide.

Sen. Susan Collins, R-Maine, chair of the Appropriations Committee, reiterated her previous statement that an "impartial investigation into the shooting in Biddeford needs to proceed." Collins had previously called it "extremely unfortunate" that the agent was not equipped with a body-worn camera. She noted that as part of the Homeland Security funding bill that ended a previous government shutdown, she secured $20 million for expanded body camera use and $2 million for deescalation training, stating that "the Democratic government shutdown delayed enactment and implementation of these important safety measures."

At least 10 people have died in encounters with immigration agents since the Trump administration intensified its crackdown. The most recent fatality was Johan Sebastián Durán Guerrero, a 25-year-old Colombian national, who was shot and killed by Brouillette on Monday near his home in Biddeford, Maine.

Sen. Richard Blumenthal, D-Conn., described the report as "absolutely appalling" and an "intolerable danger" feared due to "arrest quotas and inadequate training." He added, "This agent clearly should never have had a gun — let alone one provided to him by the United States government. And now a man is dead. I’m going to continue demanding answers and accountability."

Sen. Alex Padilla, D-Calif., accused the Trump administration of encouraging ICE and Customs and Border Protection agents to "enter and terrorize our communities, even if those agents are untrained, improperly vetted, or lack experience." He stated that the killing of Durán Guerrero was "horrifying" and called for a "credible, independent, and transparent investigation so that those responsible are held accountable."