Police responded about 6:30 p.m. to a call of shots fired in the 2900 block of West Seipp St., said police News Affairs Officer Daniel O’Brien.
They found a man unresponsive in a car with multiple gunshot wounds, said O’Brien, who could not immediately confirm whether the man killed was a police officer.
The man was an off-duty police officer who was killed in his own car, the Chicago Tribune reported.
Wentworth Area detectives are investigating.
The shooting death of an officer would make it the fourth this year. Officer Michael Bailey was gunned down in July on the South Side as he returned home from a shift guarding Mayor Richard Daley's home. Officer Thor Soderberg was shot and killed by a man two weeks before that. Officer Thomas Wortham was shot and killed outside his father's home by three assailants in May.