When a would-be North Carolina pastor called 911 he explained that he had taken a strong cough medicine before falling asleep only to wake up to find his wife stabbed to death. While Matthew Phelps may hope the cough syrup defense might save him from a murder conviction, police say the 26-year-old was obsessed with “American Psycho,” a movie about a serial killer.

Nancy Grace digs into the case with medical examiner Dr. William Morrone, Connecticut-based criminal defense lawyer Mickey Sherman, New York psychotherapist Lauren Howard, and Crime Stories contributing reporter John Lemley.

Also read: ‘Cough medicine’ killer accused of stabbing wife 123 times was obsessed with ‘American Psycho’ & talked to friend about killing: Cops

“Crime Stories with Nancy Grace” is a national radio show, heard on SiriusXM’s Triumph Channel 132, five times a day. You can also subscribe and download the daily podcasts at iTunes and Google Play.

[Feature Photo: Matthew Phelps/Police Handout]