Brian Blackwell (born 1986) is an English murderer. He killed his parents, 72-year-old Brian and 61-year-old Jacqueline at their home in Melling, a village in the northern suburbs of Liverpool, England, on 25 July 2004. Medical experts have since diagnosed Blackwell as having narcissistic personality disorder, which is characterized by extreme feelings of self-importance, a high need for admiration, and a lack of empathy.