I am a movie director and I just received the following movie plot. Could you help me answer this question? If not, let me know by writing "Not answerable". Plot title: The Fugitive Movie plot: Dr. Richard Kimble (Harrison Ford) is a successful , University of Chicago-trained, Chicago based vascular surgeon who returns home from an operation after a party one evening to find his wife (Sela Ward) dying following a brutal attack and a mysterious one-armed man with a prosthetic arm escaping. Despite his attempts to save her and his testimony about the one-armed man, Kimble is convicted of first-degree murder, due to evidence such as a misunderstood 9-1-1 call, his fingerprints found "on the lamp, the gun, and the bullets," and no signs of forced entry by the one-armed man. Kimble is sentenced to life in prison.During the bus ride to the prison, one of the prisoners fakes a seizure and begins to foam at the mouth as if poisoned. A guard unlocks the cage separating him from the prisoner to assist him. The prisoner stabs him with a shank made from a concealed sharpened toothbrush, and chaos ensues. Another guard shoots the prisoner with a shotgun. A second prisoner tries to grab the gun from the guard, but in the struggle, the gun goes off and kills the driver. The bus crashes through a guardrail, rolls down a hill, and lands on a railroad track. The light from an approaching freight train appears, and Kimble manages to pull himself and one of the guards to safety just as the train rams into the bus at speed. The bus is dragged on the front of the first locomotive for several hundred feet, but upon crossing a trestle, the first locomotive's coupler breaks, and every car from the second engine on back derails. Kimble manages to outrun the derailing locomotive as it buries itself nose-first in the ditch.Kimble is freed from his chains by another survivor, Copeland, and both escape from the scene on foot.A car arrives at the crash site, containing Deputy United States Marshal Samuel Gerard (Tommy Lee Jones), who leads a team of men from the US Marshals Service Fugitive Task Force, including Marshals Cosmo Renfro (Joe Pantoliano), Bobby Biggs (Daniel Roebuck), Erin Poole (L. Scott Caldwell), and Noah Newman... My question: Which police department chased Nichols and Kimble?
The answer to this question is:
Not answerable