A neuropsychologist who interviewed the man charged with murdering an exchange student in Darwin has given evidence on day three of the Supreme Court trial in Darwin. Brendan Kantilla has pleaded not guilty to the murder of 23-year-old Bangladeshi man Isfaqur Rahman in May 2023 with the defence arguing the accused was suffering a substantial mental impairment at the time. And a warning, some viewers may find the following report distressing.