Knights of the City

Knights of the City originally Cry of the City is a 1986 action adventure film starring Leon Isaac Kennedy, Nicholas Campbell, John Mengatti and Janine Turner. It was directed by Dominic Orlando and written by Leon Isaac Kennedy and filmed in Miami, Ft. Lauderdale and Hollywood, Florida.

Meanwhile, McGruder Floyd Levine, a corrupt police officer is making life even harder for the Royals, as are the Mechanics, a rival gang trying to take over the Royals territory. The Mechanics have been selling bad drugs and are also trying to extort protection money from merchants in the Royals neighborhood. A violent faceoff between the two gangs results in only the Royals being jailed as it is discovered McGruder is being paid off by the Mechanics. In jail, the Royals use their time to rehearse their songs.A drunken inmate, Mr. Delamo Michael Ansara, is impressed and offers his assistance, telling them that he owns Twilight Records. Dubious but curious, the Royals visit Delamo upon release from jail only to be rebuffed by his yuppie assistant and daughter, Brooke Janine Turner. The Royals leave behind a recording of their music and storm out of the office. ........

Source: Wikipedia