DrBrewster'ssuicidetakesaparticulartwistwhenthepathologistdeterminesthathehadalsobeenboundandgaggedTheBrewsters,bothmedicaldoctors,ranaprivateclinicandtheirsonJohn,wholivedathome,isdoctoralcandidateinphilosophyOnepossiblesuspectisMichaelSteppingswhothreatenedtheBrewstersandtheirnurseafterhisdaughtersufferedseveresideeffectsandisnowinavegetativestatefromabotchedoperationtwoyearspreviouslyTheforensicslabdeterminesthatoneofSteppings'sthreateningletterswasalteredandMorselearnsthatBrewstermayatonetimebeenhavinganaffair,sohemustconsideranotherpossiblemotiveformurder
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