“.. was the psychotic episode leading to the killing caused by the voluntary consumption of drink and drugs or was it caused by, or significantly caused by, the schizophrenia made worse by the intoxication against a background of a dependency syndrome.”
“The judge's conclusion after very careful consideration of the medical evidence before him was that although the offender had suffered from an abnormality of mind, namely schizoid-affective disorder/schizophrenia, the offender's voluntary taking of drugs had triggered the offender's vulnerability to psychosis and led to the killings.”