Fact-basedstoryabouta1975cover-upofashootingbytwowhitemembersoftheBostonTacticalUnit.Whileonstakeoutonasuspectedgetawaycarusedinaarmedrobbery,thetwogunneddownablackmanwhoenteredthecar.Thetwoclaimedthemanhadagunandtheyshotinself-defense.Policeinvestigationdecideditwasarightfulshooting.Theman"swidowknewherhusband..aaa