The Insider (1999)

Jeffrey Wigand was a scientist employed in research for a tobacco firm, Brown and Williamson. Not long after he was fired by Brown and Williamson, Wigand came into contact with Lowell Bergman, a producer for 60 Minutes who worked closely with journalist Mike Wallace. A research chemist comes under personal and professional attack when he decides to appear in a '60 Minutes' expose on Big Tobacco.