Righteous Kill

Turk and Rooster, two aging NYPD detectives who have been longtime partners are faced with a serial killer who is murdering sociopathic criminals. They both have personal issues, and when they start working with a younger team, Perez and Riley, tensions between the pairs of partners is inevitable, especially since Turk is now living with Perez's ex-girlfriend, also a homicide detective. (official distributor synopsis)