 The team is confronted with a type of serial killer the FBI never caught before: a sniper, or by the official euphemism Long Distance Serial Killer, who hits from an invisible position with single shots unrelated innocents, even playing children, in public places in Des Plaines, Illinois up to three at a time. His accuracy with a difficult military weapon, methodical preparation and apparent knowledge of law enforcement practicalities -such as shift changes affecting presence at given times- indicate a (former?) policeman. However when they arrest a suspect during a reconstruction, he is shot dead, proving the theory he s now in another profession, indeed in the hospital....