Insanity defense and witness absence in Lori Vallow trial.

Lori Vallow, accused of killing her two children and her husband's previous wife, will not call any witnesses to defend herself in court. The prosecution rested its case after four weeks of harrowing testimony, including salacious texts between Vallow and her husband Chad Daybell, revealing their alleged deranged plan to kill her children, who they believed were possessed by 'dark' spirits. Closing arguments will be on Thursday, and the highly-anticipated verdict could come as soon as this week.