Prosecutors and police officers accused in a civil suit of framing a man for a double murder have been barred from bringing up the man’s exercise of his right against self-incrimination at his criminal trial.In a written opinion, U.S. District Judge Ronald A. Guzman noted the issue facing him — whether someone’s silence at his or her criminal trial may be used to draw an adverse inference in a later civil trial — appeared to be one of first impression.Guzman concluded it would be unfair to penalize …