Hours after the incident, Oregon attorney general
Dan Rayfield said that the
Oregon Department of Justice had opened an investigation the day of the shooting. Rayfield stated the investigation would draw from interviews with witnesses and video evidence to determine if CBP agents had
exceeded their lawful authority in the shooting. He also said the FBI had opened a "concurrent" investigation, hoping that "cooperation will continue".
Portland Police chief
Bob Day said that they did not know which federal department was involved. Day added that local officers were providing "investigative support and perimeter support" that was "minimal" to the FBI-led investigation. Day later stated that the couple's possible connection to the gang "in no way draws a throughline" to the shooting. However, Day stated that Zambrano-Contreras was previously arrested for prostitution in
Washington County after police served her search warrant and during which Nico-Moncada was present. Independent investigations found Nico-Moncada had an open
DUI case in Washington County filed in early December 2025. He also had a number of speeding tickets in
Multnomah County. Zambrano-Contreras was listed as a witness in
grand jury proceedings. Court records also showed that Nico-Moncada has a protective order against Zambrano-Contreras that was obtained in November 2025 after he wrote that she hit him with her car and told people she would kill him the next time she saw him. Although the judge approved the request, the couple remained together. == Aftermath ==