A Maine Immigration and Customs Enforcement (ICE) officer who fatally shot 25-year-old Colombian national Johan Sebastián Durán Guerrero on Monday, July 16, 2026, has a documented history of serious mental health challenges and violent behavior, according to several of his close relatives speaking to The Associated Press.

David Brouillette, an Army veteran, was said by family members to have been diagnosed in childhood with manic bipolar disorder and attention deficit disorder, a diagnosis confirmed by Ashley Brouillette, a relative. Relatives also accused him of attacking women over the years, including sharing a voicemail from last winter in which he threatened to slit a woman's throat.

The shooting occurred near Durán Guerrero's home in the coastal city of Biddeford, Maine. The Department of Homeland Security (DHS) has not released the officer's name but stated that the vehicle attempted to flee and, fearing for public safety, an officer discharged his weapon. Brouillette's 18-year-old daughter, Madison Brouillette, told the AP that her father called her on Wednesday, July 15, and admitted to shooting and killing Durán Guerrero.

The revelations about Brouillette's mental health and violent past raise questions about the vetting process of ICE officers amid a hiring surge following President Donald Trump's immigration crackdown. At least 10 people have died in encounters with immigration agents since the crackdown began.

ICE spokesperson Lauren Bis declined to confirm Brouillette's identity or comment on his record, stating, "We will never confirm or deny attempts to dox our law enforcement officers," and noted that the officer has nearly a decade of federal law enforcement experience, including use of force training.

Brouillette grew up in Gardiner, Maine, about 60 miles northwest of Biddeford, where relatives said he was fascinated by law enforcement and the military from a young age.

Sources