The father of a man who shot and killed five people in Plymouth last year said he is "sorry and ashamed" over his son's actions.
Jake Davison, 22, murdered his mother at her home and then fatally shot another four people, including a three-year-old girl, during a 12-minute rampage in Keyham on August 12.
Davison, who had suffered mental health problems and could have been influenced by "incel" culture, had a firearms licence and legally held a pump-action shotgun.
