The Wronged One (2010)

Revenge is law in this series about two NYPD detectives who use their power of law to carry out a string of revenge killings, inadvertently making them a notorious serial killer in the public's eye. But when One Police Plaza declares war on the seemingly retired killer, detectives Davenport and Gearhart must find out who is copycatting their style before their unit puts all the pieces together. Think Breaking bad meets Dexter.