Regina v. Martin Dyos

Dyos (defendant) was part of a group of seven young men who fought another group of five after a community-center dance. During the fight, one member of the other group, RM, was struck in the forehead with a brick (which Dyos admitted throwing) and also received a separate blow behind his ear from an unknown source. RM later died, and Dyos was charged with murder, among other offenses. At trial, a pathologist testified that either wound could have been fatal on its own and that he could not say which wound came first or whether RM would have survived the brick alone.