Chevron 7 locke

Okay, so I'm thinking the "slightly red tint" to their eyes would be really noticable. That and the people using lower tones of voice. I don't think we would've noticed any muscle twitches, seeing as how we weren't near the infected long without combat. I'm thinking Light, being the closest to non-dying infected who were not in stasis or in combat would have the highest chance of having spotted it. But I wonder if he would have noticed it... And on top of that, whether or not he would have connected it...