Robert Johnson, 52, of Chicago, was shot and killed on May 7, 2020, during an attempted carjacking. He was standing beside his girlfriend’s SUV when a group in a white sedan approached and tried to take the vehicle. During the altercation one of the suspects, identified as Jimmy Walker, pointed a gun and a shootout followed; Johnson was found in the street with a gunshot wound to the chest and pronounced dead at the scene.

Investigators later identified four participants. Jimmy Walker, 19 at the time, was charged with first-degree murder; Malik Boyd and a 15-year-old boy were charged with murder during a felony; a fourth member remained unidentified. The group also faced charges of attempted vehicular hijacking and attempted robbery with a firearm. The arrests were announced in March 2022 after an investigation that took nearly two years.

Anyone who witnessed the carjacking or has information about the unidentified fourth person is asked to come forward.