>> yeah. >> reporter: derek haysom had been stabbed 36 times. nancy six.s found in the kitchen. both were stabbed in the heart. both nearly decapitated. >> as you step over and come in, this area right here is where all the blood was. >> reporter: where? >> just around in this area. smeared around in this area here. >> reporter: the first thing in your mind was -- >> what kind of gang came in here and did this? >> there was concern because of the smearing blood, initially, that there was some sort of cult involved. >> rumors of witchcraft, voodoo, fueled curiosity and the demand for answers. >> reporter: whodunnit theories are rampant. word that derek haysom upset workers in the steel business fuels rumors of mafia-style hit. but a clue in a rental car agreement is about to change the direction of the case. you saw that and you thought -- >> that's when we got to thinking, "well, wait a minute." >> reporter: stay with us. sed te room smelling like sweaty odors. yup, he's gone noseblind. he thinks it smells fine, but his mom smells this... luckily there's f