Editing Brian Blackwell (section)

===Trial and aftermath===
On 5 September 2004, six weeks after they were killed, police discovered the decomposing bodies of Blackwell's parents after a neighbour called to report a strong, unusual odour coming from the property. The injuries from the attacks were so severe that investigators initially thought they were gun shot wounds. Blackwell was arrested the following day and charged with two counts of murder. He denied the charges during initial interviews and hearings and was remanded into custody without bail until trial.

During an interview, Blackwell claimed he knew nothing of his parents' deaths and was on holiday when they were killed. 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 conflicted with Blackwell's claim of self-defence. Afterwards, according to Blackwell, his mother came in, and he attacked her.

The double-murder charge was dropped after he pleaded guilty to the lesser charge of manslaughter on the grounds of diminished responsibility after experts diagnosed him with narcissistic personality disorder. Blackwell was sentenced to life imprisonment on 29 June 2005. Although the trial judge stated that Blackwell would never be fit for release, he was paroled in 2016 after 11 years in prison.