After the killers were arrested for the murders of Leslie Mahaffy and Kristen French, Tammy Homolka's body was exhumed.
Tammy Homolka grew up in the neighbourhood of Port Credit to a Czech father and a Canadian mother.
She obtained a bottle of Halothane (a liquid general anesthetic) from the veterinary clinic where she worked, which would later be used to sedate Tammy while the two raped her.
On December 24, 1990, Tammy was drugged with a combination of Halcion and alcohol, passing out in the family room in the basement of the Homolka house.
[citation needed] In 2001, the magazine Elm Street published an article in which it implied that forensic evidence proved that Tammy's death was not an accident and that her sister had deliberately administered an overdose of halothane.
The magazine described Karla as a "malignant narcissist" who was so incensed by her fiancé's attraction to her sister that she took steps to remove Tammy from his affections permanently.
[2] On February 26, 1993, the defense lawyer and the Crown began negotiations on a 10-year sentence for Karla in exchange for her testimony and full disclosure of all crimes.
When she was admitted for psychiatric assessment in March 1993, Karla confessed in a letter to her parents about her involvement in Tammy's death.