Narc (2002)

Synopsis
Suspended from the police force following an undercover drug bust gone horribly awry, Detroit undercover narcotics officer Nick Tellis (Jason Patric) is reluctantly goaded back into active duty in hopes that he can help to crack the case of a slain fellow officer. Promised reinstatement in the force in exchange for his efforts, Tellis is paired with the victim's volatile ex-partner Henry Oak (Ray Liotta) and soon begins to actively seek the killer in an increasingly complex case. A recent father whose wife fears for her husband's safety and begs him not to take back to the dangerous streets, Tellis struggles with his conscience as he navigates a twisting road of half-realized truths, shifting loyalties and questionable agendas. With every step closer to Tellis gets to solving the troubling murder, he grows farther away from his wife and newborn son, and edges ever closer to a resolution so complicated that it threatens to devour his soul and shatter every preconceived difference he has ever made between cop and criminal. ~ Jason Buchanan, All Movie Guide