During a trial for unlawful act manslaughter arising from a workplace incident involving a compressed air hose, the defence sought to cross-examine the Crown's forensic pathology expert on a statement from a 1942 journal article regarding public perception of the dangers of compressed air.
The Crown objected.
Following a voir dire, the court ruled that the question could not be put to the expert.
The court found that public perception was outside the expert's area of expertise, the 1942 article was of limited reliability for assessing public knowledge in 2015, and the question had no probative value while carrying significant prejudicial effect.