Alejandro Arellano, 29, was fatally shot on November 12, 2017, in the Brighton Park neighborhood of Chicago. He and another 29-year-old, Angel Rosario, were sitting in a parked vehicle when a gunman approached and opened fire, killing both men. The shooter fled the scene and no arrests were immediately made after the attack.

The killings occurred during a particularly violent weekend for the city and added to Chicago’s 2017 gun-related homicide toll, highlighting ongoing violence in some neighborhoods. If anyone was in Brighton Park on November 12, 2017, or has information about the shooting, please share what is known with investigators.