Four suspects are in custody in connection with the fatal shooting Dec. 29 of an off-duty Chicago police officer, the Chicago Sun-Times reported Friday.

One of the four men is a 34-year-old parolee who was ordered held without bond Friday on an unrelated gun charge. The parolee, whom the paper did not name because he is not charged in the death of Officer Clifton Lewis, was in a car that was stopped Tuesday for making an improper turn.

Tactical officers stopped the car in an effort to gather information about the murder of Lewis, 41, who was shot while working a second job at a convenience store in the 1200 block of North Austin Blvd., just across the street from Oak Park.

Police found a .357-caliber handgun with two live rounds in the car, the Sun-Times report said. The man appeared in Cook County Criminal Court Friday, the day after funeral services were held for Lewis. The other three suspects are in custody at the Grand-Central detective headquarters.

Chicago Police News Affairs would not confirm Friday that there were suspects in custody.

Police have said two masked men came into the store to rob it before shooting Lewis. The Sun-Times report said the men got away with hundreds of dollars. Lewis’ weapon is missing, along with the TEC-9 semiautomatic weapon police believe was used to shoot him, the report said.