SUGGEST ARCHIVE Shot 07/08/2011.## (CNN) — A California judge on Friday entered a not guilty plea on behalf of a German-born man who gained notoriety for impersonating a Rockefeller.   Christian Karl Gerhartsreiter, 50, is accused of killing John Sohus, who was 27 when he went missing in 1985. At one point in his life Gerhartsreiter assumed the identity of "Clark Rockefeller," a cultured poseur who never seemed to have a job.## high profile case.##