The boyfriend who allegedly murdered Laura Wallen told the pregnant Maryland teacher's father he had no contact with another woman for 2 years, but that was before police revealed Tyler Tessier was living with the second woman. "He is a monster and he is a liar," Mark Wallen said of the man accused of killing his daughter. Wallen's father and mother pretended at the request of police to not suspect Tessier as part of a strategy to get him to incriminate himself, police said. Nancy Grace discusses the case crime scene expert Sheryl McCollum, psychoanalyst Dr. Bethany Marshall, and reporter Leigh Egan. They also look at the first week of testimony in the trial of the Tennessee man accused of kidnapping, raping and killing Holly Bobo.