[JURIST] Two former Blackwater [JURIST news archive] contractors were convicted [press release] Friday of involuntary manslaughter in the US District Court for the Eastern District of Virginia [official website] for their role in the May 2009 shooting deaths of two Afghan nationals and the wounding of a third. Prosecutors alleged that the two men, Justin Cannon and Christopher Drotleff, left their military base without authorization and opened fire into the back of a civilian car after a traffic accident. The…