Professor Greenberg's May 2017 report
1. Professor Greenberg had earlier examined Mr Poynton in 2012, when he was in custody for juvenile offending.
2. In 2017 he considered that Mr Poynton could be suffering Polysubstance disorder, psychotic illness, Schizophrenia Disorder or Chronic Drug induced psychosis, with a history of ADHD, and personality disorder or traits.
3. He was not fully convinced that Mr Poynton was suffering schizophrenia at the time of the murders, or that auditory hallucinations played any direct commanding role, ordering him to kill his victims, where he had to comply with or obey the orders. Mr Poynton was however, either intoxicated, or had a drug induced perceptual disturbance, auditory hallucinations and paranoid thoughts or both, at the time of the offences.
4. Professor Greenberg was of the view that Mr Poynton did not qualify for a defence of mental illness, because he likely had a degree of reasoning and composure about what he was doing and its wrongfulness at the time.
5. While Mr Poynton's drug induced psychotic symptoms would likely qualify him for a disease of the mind, on balance he did know the nature of his acts and that they were legally and morally wrong.
6. At the time Mr Poynton did have drug induced perceptual disturbances, namely non commanding voices, but the significant feature would have been his heightened or exaggerated paranoid thoughts, from his voluntary use of crystal methamphetamine. This likely would have substantially diminished his capacity for self-control, at that time.