** FILE ** This undated photo provided Thursday, Dec. 13, 2007 by Colorado Springs Police shows Matthew Murray. Murray went on a deadly shooting rampage in two Colorado religious centers before killing himself on Sunday, Dec. 9, 2007. (AP Photo/Colorado Springs Police)
Denver (AP) The parents of a 24-year-old who killed four people at a church and a missionary training center says the man had attention deficit hyperactivity disorder and harbored bitterness for being an outcast.
Matthew Murray gave no indication he was about to explode in violence, though, they said in an interview to be broadcast tomorrow and Friday on James Dobson's focus on the family radio program.
Ronald and Loretta Murray say their son had problems communicating and writing because of his ADHD, was brilliant at computers, and felt rejected and marginalized, unable to forgive his perceived tormentors.