 The background check leads Mulder to Senator Richard Matheson ( Raymond J. Barry ) , which results in a dead end . Scully discovers Skinner 's blood sample and , after checking , she finds that Skinner 's blood contains <unk> carbon . Meanwhile , Skinner ends up in hospital following a gunfight in the FBI parking garage . Mulder and Scully reunite at the hospital , where Mulder tells Scully that Skinner was investigating a health funding bill called S.R. 819 . Later , the physicist dies of the same carbon blood condition from which Skinner is sick . 
