Complex sentence: The child's body was found in Naperville, DuPage County, Illinois by a man walking his dog, which had been wrapped in a blue laundry bag that was disposed of alongside the Ronald Reagan Memorial Tollway, which is part of interstate 88.
Split into simpler sentences: The child's body was found in Naperville, DuPage County, Illinois by a man walking his dog. The corpse had been wrapped in a blue laundry bag that was disposed of alongside the Ronald Reagan Memorial Tollway, which is part of interstate 88.