True Blue.

When a dismembered hand is found in a city pond, maverick cop Rembrandt Macy is drawn into a chilling investigation. His search for answers leads him into the secret life of the victim, guided by her roommate Nikki. As Macy uncovers a web of corruption, from shadowy dealings at City Hall to a ruthless gang of Asian drug traffickers, he realizes that nothing is as it seems, and that Nikki herself may be hiding dangerous secrets.