Murder in Bethnal Square : An Inspector Combridge and Mr. Jellipot Classic Crime Novel

When the blackmailer Henry Coldwater is murdered, Basil Forbes becomes the prime suspect, since he admits having thrashed Coldwater an hour before his death. But solicitor Mr. Jellipot has no trouble clearing Forbes' name, leaving Scotland Yard Inspector Combridge with a terrible dilemma: who killed Henry Coldwater? And, more importantly, why?