Pacino performance is of course top notch. This guy is not played a s a plaster saint, but as a human being with both fears and courage torn between a desire to protect himself and those he loves from the revenge of crooked detectives and their protectors, and doing the right thing.
This is a film worth seeking out if you have a DVD or a Netflix account.
Here's an update on one recent whistleblower case in the NYPD, featuring some thoughts from Mr. Seprico. http://rt.com/usa/nypd-whistleblowers-facing-retribution-589/