Serpico (1973)

An honest New York cop named Frank Serpico blows the whistle on rampant corruption in the force only to have his comrades turn against him.

Director: Sidney Lumet

Cast: Al Pacino, John Randolph, Jack Kehoe, Biff McGuire, Barbara Eda-Young, Cornelia Sharpe, Tony Roberts, John Medici, Allan Rich, Norman Ornellas, Edward Grover, Albert Henderson, Hank Garrett, Damien Leake, Joseph Bova, Gene Gross, John Stewart, Woodie King Jr.