Career
Medical experts have since diagnosed Blackwell as having narcissistic personality disorder, which is characterised by extreme feelings of self-importance, a high need for admiration, and a lack of empathy. Blackwell was described as an "exemplary student" at Liverpool College and nicknamed "Brains" by his family. He created a web of lies about his life, including claiming he was a professional tennis player.
To support his claims of wealth, he applied for thirteen cr cards in his father"s name.
He beat both with a claw hammer and stabbed them repeatedly. After the killings, he took his girlfriend Amal on holiday to New York City, United States of America, where he spent £30,000, including the bill for a three night stay in the presidential suite at the Plaza Hotel.
A week later he returned to school and found that he had earned As in all of his A-levels, which would have gained him a place at the University of Nottingham to study medicine in October. The attacks were so severe that investigators initially thought the couple had been shot.
After two days of questioning, Blackwell"s story began to change.
He confessed to the killings and claimed that he had acted in self-defence. According to Blackwell, he was holding a claw hammer for hanging a picture on the wall when his father stood up to hit him. Investigators had previously learned that Blackwell"s father had been struck on the back of the head while sitting down, which conflicts with Blackwell"s claim of self-defence.
Afterwards, according to Blackwell, his mother came in, and he attacked her.
Blackwell was charged with murder and was due to stand trial. However, that charge was dropped after he pleaded guilty to the lesser charge of manslaughter on the ground of diminished responsibility after experts diagnosed him with narcissistic personality disorder.
Blackwell was sentenced to life imprisonment on 29 June 2005. This was the first case in an English court in which narcissistic personality disorder had been found to be a defence to murder.
