<sod >Â  Karla Homolka, 47, was jailed for manslaughter over her role in torturing, raping and killing schoolgirls Kristen French and Leslie Mahaffy - as well as her own 15-year-old sister Taffy - with her then-husband Paul Bernardo in 1993.Â  Parents at Greaves Adventist Academy, a private Christian school in Montreal, noticed HolmolkaÂ dropping off and picking up her children at the premises, but were alarmed to find out she had been spending time in classrooms, local media reported.< eod>< sod > Â  Karla Homolka, 47, was jailed for manslaughter in 1993 over her role in torturing, raping and killing schoolgirls Kristen French and Leslie Mahaffy - as well as the rape and death of her own 15-year-old sister Taffy - with her then-husband Paul Bernardo.< eod>