Amusing as it could be in small doses, he was really getting annoyed at how much people underestimated him. From whether or not he could kill someone, and now to be able to have hidden motives. Maybe he was just that good that people didn't realize he had depth.
Zacharias just smiled like he had a secret and picked up his utensils to start in on his food. That was the question wasn't it - why was he there? what was he thinking? The truth was the whole think that accidental and a little bit traumatizing to be covered in someone else's blood (and without the satisfaction of a job well done).
"I don't think I'm allowed to comment on an ongoing investigation," he said with an air of teasing to his voice sure that was not the answer she wanted. Still, it was the only one she was going to get after her little comment. "Although things are never as they seem. You should know that."