So in our game the group put to sleep a number of guards to avoid unnecessary bloodshed (using excellent role play and strong dwarven ale). It was a detailed plan they executed well. One player however specifically went to a few of the guards and slit their throats while they slept. The character was neutral good. The comment made was that he wanted to make sure they didn't wake while they lead the refugees away. He could have bound them up I feel as they were likely out for the count. As the guards were of varying alignment the group was leery of killing people who didn't deserve it. Suffice it to say his act angered the group and shocked me. I believe an alignment shift is in order. I can see this changing him to neutral evil now. Thoughts??