The Crown sought to call a Detective Constable as an expert witness on covert, coded, and street language to assist in understanding wiretap evidence in a conspiracy to commit robbery case.
The defence challenged the officer's qualifications under the fourth branch of the Mohan test, arguing he could not give impartial evidence and lacked necessary qualifications.
The court admitted the expert evidence, finding the officer capable of satisfying his duty to remain independent and impartial despite being a police officer, and that he possessed sufficient specialized knowledge acquired through thirteen years of police work, including eight years in specialized units dealing with street gangs and coded language.
