A man was found dead on the street in Lincoln Park.
Now, Chicago police are trying to determine whether he was murdered.
32-year-old Jacob Klepacz was discovered in the 1500 block of west Fullerton, early Monday morning.
Police responded to a call about a possible battery.
The medical examiner’s office says he suffered head trauma.
But it won’t say, that’s what killed him.
And it doesn’t say whether the trauma was accidental, or the result of an attack.