Dr.Brewster’ssuicidetakesa articulartwistwhenthe athologistdeterminesthathehadalsobeenboundandgagged.TheBrewsters,bothmedicaldoctors,rana rivateclinicandtheirsonJohn,wholivedathome,isdoctoralcandidatein hiloso hy.One ossiblesus ectisMichaelSte ingswhothreatenedtheBrewstersandtheirnurseafterhisdaughtersufferedsevereside-effectsandisnowinavegetativestatefromabotchedo erationtwoyears reviously.TheforensicslabdeterminesthatoneofSte ings’sthreateningletterswasalteredandMorselearnsthatBrewstermayatonetimebeenhavinganaffair,sohemustconsideranother ossiblemotiveformurder