An officer with the Midlothian (IL) Police Department gave "multiple verbal commands" to security officer Jemel Roberson to drop his gun and get on the ground before fatally shooting Roberson early Sunday morning, according to the Chicago Tribune.

In a preliminary Illinois State Police investigation released late Tuesday, witness statements showed that the unidentified officer—who was responding to a shots-fired call—"gave the armed subject (Roberson) multiple verbal commands to drop the gun and get on the ground before ultimately discharging his weapon and striking the subject."

The state police report said "officers readily provided medical assistance to multiple gunshot victims, including Roberson. Roberson was transported to a local area hospital where he was pronounced deceased."

Greg Kulis—the attorney for Roberson’s family—questioned how quickly police were releasing details of their investigation.