He reveals that Barr had gone on a killing spree during his tour in Iraq but was not prosecuted because , unknown to Barr , his victims were under investigation for multiple rapes .
He reveals that Barr had gone on a killing spree during his tour in Iraq but was not prosecuted because , unknown to Barr , his victims were under investigation for multiple rapes — and the U.S. Army wants them forgotten .
Jack Reacher -LRB-film-RRB-