Chad, part of a doomsday plot. >> the defendant used money, power, and sex, or the promise of those things to get what she wanted. >> prosecutors say it started with when lori vallo author chad daybell, telling friends lori's children had become zombies, taken over by dark spirits. >> if somebody is dark, an evil spirit or entity can come in, push the real person out, and take over the body. the body had to be destroyed. >> but prosecutors say the couple used religious teachings to justify everything from an affair to murder. chad and horry, marrying in hawaii, weeks after the death of chad's ...