A Fire in the Sun — George Alec Effinger

Once a small-time street hustler in the decadent ghetto called the Budayeen, Marid Audran has become a part of the system he has always despised, cut off from the life he once lived. He's traded his independence and his honor for a position as a cop, an enforcer in the employ of Friedlander Bey, the most powerful man in the city.

Now Audran has stumbled upon a ruthless campaign of terror that cruelly strikes down his partner. Bent on vengeance, Audran discovers a bitter truth about his own history that may alter his life forever.