FILE This 1969 file photo shows Charles Manson being escorted to his arraignment on conspiracy-murder charges in connection with the Sharon Tate murder case Los Angeles, Calif. Mass murderer Anders Behring Breivik's shocking testimony to a Norwegian court has revived a debate about how much of a public platform mass-murderers should be given in trials. Such atrocities are often waged for attention and carried out in the name of political or religious goals, and a trial gives perpetrators more of what they crave: a huge audience. Cult leader Charles Manson, who persuaded others to kill for him, refused to testify in the raucous 1970 trial of him and other members of his "Manson Family." In an unusual proceeding, Manson was allowed to testify outside the jury's presence so that the judge could rule on whether his testimony was admissible in front of jurors.(AP Photo)