Biography: Karla Leanne Homolka, also known as Karla Leanne Teale, Leanne Teale, and Leanne Bordelais, is a Canadian serial killer who acted as an accomplice to her then-husband, Paul Bernardo, taking active part in the rapes and murders of at least three minors in Ontario – including her own sister, Tammy Homolka – between 1990 and 1992.