Carlos wasn't really the type to get mad easily. Sure, he used guns and that lot, and he was very agile, but sometimes when he was out on his own he just shot everything that moved. Except humans, because he could somehow tell from afar if it was a human or infected.

But when he came back after his last mission, he looked a little... Stressed. Stressed, and dangerously angry. He walked straight past everyone and into a room, slamming the door behind him.

So, why not check on him? Since nobody else wanted to...