On the planet Noveria, when Commander Shepard enters the Hot Labs, the Russian scientist inside warns him of the Neutron Purge. Upon being asked for the codes, the scientist will be killed by a Rachni grunt. Should the player interract with the V.I without having obtained the codes from the scientist, an option will be available that has Shepard mumble something. Choosing this option causes Shepard to mumble "Sic semper tyranus...", a Latin phrase meaning "Thus always to tyrants." This phrase is a rally cry against those who abuse political power, and was spoken by Marcus Julius Brutus during his assassination of Julius Caesar, as well as John Wilkes Booth during his assassination of President Abraham Lincoln.