Reasoning
He watched the hulking krogan gun down the man known as Fist. He yelled out what hell was he doing. The Commander did the same, telling the krogan not to shoot unarmed civilians. The krogan, Wrex, shrugged and said he always finished his contracts. Garrus watched the Commander's ocean blue eyes squint slightly at the krogan before she ordered the team to move out. They had a quarian to save, one that could give them the intel they needed to prove Saren's guilt.