Statistical research establishing a general correlation between first episode psychosis and violence cannot be used as evidence to prove causation or establish the legal criteria of the partial defence of substantial impairment or the mental illness defence in an individual case; and a psychiatrist's changed opinion based on information available at trial is new evidence rather than fresh evidence.
The full text is available to signed-in members, including the 8 later cases that cite this judgment.
2 of the 8 citing cases carry a classified treatment. How each court treated it is available to signed-in members.