Pfft, murder is a legal definition. ... You can tell which option I chose. I came away from that loyalty mission thinking it'd been abnormally short, because it went something like this: Garrus: So there's this guy who sold out my team and I wanna kill him. Help me do it? Shepard: Okay. Garrus: Great, he's here, let's track him down. Shepard: Lead the way. Garrus: Go talk to him and distract him while I set up a shot. Shepard: Sure. Garrus: You're in the way, move a bit to the side. Shepard: *moves* Garrus: *shoots and kills Sidonis* Shepard: Great! Let's head home. I'm paraphrasing obviously, but it did make for a curiously short and easy loyalty mission. Only much later on did I realise there'd been a whole lot more to it on the Paragon side. Oh well, next playthrough.