Alicia tries to arrange for a Chicago PD narcotics officer, Jack Arkin, to provide evidence to the FBI on police corruption in return for immunity from prosecution and relocation under the witness protection program. Before the deal can be made, however, Arkin is gunned down in the line of duty. Alicia and others think it was a set-up, but ballistics expert Kurt McVeigh thinks the police are telling the truth. With the firm now seeking a negligence suit against the city, Carey Agos shows up as the State's Attorney to take Mrs. Arkin's deposition. Kalinda comes under suspicion when her friendship with one of the officers under suspicion comes to light. Meanwhile, Peter Florrick has decided to wait to run for office and Eli Gold wants Alicia to get him to change his mind.
—garykmcd