Get ready for Oxygen's second season of "Killer Motive" with these four unbelievable cases, wherein people took others' lives for the most banal and bizarre reasons.
Stephanie Roller Bruner, a mother of three who loved teaching dance, was a quiet victim of domestic violence before she was found strangled and frozen in a Silverthorne lake.
David Miller didn’t just lie to his wives: when unable to repay his friend for the thousands of dollars he borrowed, he said he was supposedly diagnosed with cancer.
Just hours before their death, Manson Family victims Leno and Rosemary LaBianca had been talking about the Sharon Tate murders that happened the night before.
John Leonard Orr's unpublished book, "Points of Origin," detailed an arson spree that eerily mirrored his own — and helped authorities close the net on him.