The Manhattan DA's office tries a drug dealer for a murder that took place in the Bronx--a case where another man has been already been convicted of the crime by the Bronx DA's office and is serving time.
Briscoe and Green are suspicious of two FBI agents who provide an alibi for an Irish mobster suspected of murder. The case is further complicated by the murder of a witness and the emergence of the mobster's lookalike brother.
Jack tries to prove that a state senator and a mobster conspired to kill a journalist investigating voting irregularities. But connecting the dots is difficult without cooperation from the journalist's confidential source.
A pair of feuding siblings who share ownership of a building are suspects in the murder of one of their tenants, because she may have been the only person keeping them from selling the building for millions of dollars.