The body of Ibrahim Nofal was found last weekend in a Joliet park. He vanished from his business earlier last week.
Surveillance video at the repair shop showed a silver Jeep Grand Cherokee leaving the parking lot at the time of Nofal's disappearance.
Police say, based on the decomposition of Nofal's body, it appears the murder took place very soon after he was abducted.
A cause of death hasn't been released, but the coroner has ruled his death a homicide.