During a murder trial, the defence sought to call a forensic psychiatrist to testify that the accused may have been in a cocaine-induced psychosis at the time of the offence, and that the alleged conduct was out of character.
The court ruled that the expert could testify about the potential impact of cocaine consumption and the possibility of psychosis, as this was relevant to the defence of intoxication and the ability to form specific intent.
However, the court excluded the expert's opinion that the offence was out of character for the accused, finding it to be impermissible character evidence and oath-helping.