That guy scares me

There is a guy at work that scares me. He has a killer's eyes. Like he has the capacity to kill. And maybe has before. He looks like he would do it with his bare hands. Or beating with a blunt object, laughing the whole time. If he did use a gun, he would stare you right in the eyes and shoot ya right between them. He's probably a really nice guy, but he scares me anyway.