Karla Homolka and her husband started off their crime spree by drugging and raping Karla's younger sister, Tammy. They went on to do the same with 2 other young girls and ultimately murdering all 3. Karla claimed to be a pawn in her husband's sick fantasy but the more evidence that came out showed a whole different story. Unfortunately, the evidence came out too late and a deal had already been made.