Transcript for Illinois Manhunt for 3 Suspects Involved in Shooting Death of Decorated Officer
stars." Only on of that Illinois police officer and father. Airspace above shut down as helicopters search for the killers. Dozens of officers and federal agents joining the hunt. ABC's gio Benitez is on the scene in fox lake, Illinois, good morning, gio. Reporter: Yeah, George, good morning to you. Police setting up a perimeter for 14 hours Tuesday searching for those three men, but now it all seems eerily quiet as police try to figure out their next move. Overnight, a desperate manhunt for three men who police say killed a decorated officer, S.W.A.T. Teams on a roof, cops walking along railroad track, canine officers searching every inch of northern Illinois. Special attention, fox lake surrounding area units, officer safety. Man with a gun. Reporter: Just before 8 A.M. Tuesday, lieutenant Charles Joseph gliniewicz reported seeing three suspicious people in suburban fox lake, Illinois, 55 miles north of Chicago. He radioed in saying he was chasing the three men on foot. The only description we're told he gave, two white men and one black man. But then police lost contact. Male white and a male black fled from scene taking the officer's sidearm and pepper spray, shots were fired. Unknown direction of travel. Reporter: Backup arriving finding gliniewicz with a gunshot wound. Send everybody you possibly can. Officer is down. Reporter: Lieutenant gliniewicz, a 32-year veteran of fox lake police, our ABC station in Chicago, WLS interviewing gliniewicz in 1994 about other officers rescuing little kids from a fire. Officer Bostic stood right here. Reporter: His colleagues calling him G.I. Joe, a beloved figure in the community. A father of four boys. Tonight not only did fox lake lose a family member, I lost a very dear friend. Reporter: And we're told police are still out there searching for any clues. The school districts saying overnight they would be closing. A lot of these schools as a precaution for the safety of the children. We'll stay on this all morning long, Lara. Let's hope they find them.
This transcript has been automatically generated and may not be 100% accurate.