S04:É05 - S04:E05 - Til Death Do Us Part

In 1991, Robert Curley was diagnosed with Guillain_Barr_ syndrome when he arrived at the hospital with excruciating leg pains. However, doctors became suspicious during Robert's second admission and tested him for Thallium poisoning, which proved positive and Robert died shortly thereafter. Autopsy showed that Robert ingested more poison a few days before his death.