A psychiatrist has testified that a man knew what he was doing at the time his parents and twin brother were killed more than three years ago.
But Dr. Timothy Michaels testified Monday in Montgomery County Court that 27-year-old Joseph McAndrew Jr. was so delusional that he didn't know his actions were wrong.
Prosecutors are seeking first-degree murder convictions in the March 2011 deaths of 70-year-old Joseph C. McAndrew, 64-year-old Susan McAndrew, and James McAndrew in Gulph Mills.
Prosecutors argue that McAndrew knew what he was doing when he stabbed the victims with a sword -- and knew it was wrong.
Defense attorney Paul Bauer wants a judge to find his client not guilty by reason of insanity. He says his client had stopped taking medication months before the murders.