Eraser (1996)

John "The Eraser" Kruger is the top gun in the US Marshall Witness Protection scheme; he erases their past and deals with their future. His latest assignment is whistle-blower Dr. Lee Cullen, who has evidence against a major arms corporation that's selling weapons to terrorists with the collusion of rogue enemy agents within, but there is danger nearer home for Kruger, from within his own department.