A Chicago alderman is pressing state and county prosecutors to launch an independent investigation following the fatal shooting of a man by an off-duty FBI agent in the city’s Pilsen neighborhood.
The incident unfolded on Monday, Oct. 26, 2026, near West 18th Street and South Union Avenue. Chicago police officers responded to the scene to document the area, while Illinois State Police assisted with traffic control.
The Cook County medical examiner’s office identified the deceased man as 27-year-old Oscar D. Isaya-Corrales. According to the FBI, the agent was driving home alone in a Bureau-issued vehicle when they observed Isaya-Corrales allegedly firing a gun into a homeless encampment and subsequently opened fire.
Isaya-Corrales died at the scene. Authorities reported no other injuries. Federal officials noted that Isaya-Corrales was a native of Venezuela who had been taken into custody at the southern border in 2023 before being released. Additional reports indicated he had previously been arrested in California and released despite an Immigration and Customs Enforcement detainer.
The FBI’s Inspection Division initiated a review of the shooting. In a statement, the agency said it takes all shooting incidents involving its personnel seriously. However, that internal review has faced immediate political pushback.
Byron Sigcho-Lopez, alderman for Chicago’s 25th Ward, formally requested that the Illinois attorney general and the Cook County state’s attorney conduct an independent investigation into the incident. Sigcho-Lopez argued that an agency cannot objectively investigate its own personnel.
In his statement, Sigcho-Lopez called on the Chicago Police Department to preserve all available evidence, including witness statements and officer body-camera footage. The alderman outlined several specific questions he wants investigators to answer, including what precipitated the shooting, whether the agent continued aiming at Isaya-Corrales after he was already on the ground, and whether the agent was acting independently or as part of a formal task force operation.
Additionally, Sigcho-Lopez urged city officials to review the municipal government’s partnerships with federal law enforcement agencies, starting with existing Chicago Police Department task force agreements.
Authorities have not yet released further details regarding the exact circumstances leading up to the confrontation or the identity of the agent involved. The federal review remains active and ongoing.
