Law & Order Season 7 Episode 12 Barter ( Air Date 1997-02-12 ) Genre Crime, Drama category. Overview "An unpromising case of murder suddenly develops new leads when the cops explore the possibility that the victim was mistaken for someone else. McCoy walks a thin line in the matter of ethical conduct as he tries to make a case against a lendor who uses unscrupulous methods to collect the money owed to him.".