Where the Dead Lay - David Levien

When Frank Behr's friend and mentor is murdered without any apparent motive, he thirsts for answers and retaliation. But before he can make headway in the dead-end investigation, a private firm approaches him with a delicate proposition: two of its detectives have gone missing, and the firm wants Behr to find out what happened to them. The search for the missing detectives takes Behr into the recesses of Indianapolis's underworld, a place rife with brutality and vice where Behr uncovers a shocking thread connecting the missing detectives to his friend's brutal murder, and, in the process, an ominous, deadly new breed of crime family.