It's hard to make sense of all this madness because ... it doesn't make sense. I was talking about this with a work friend earlier. Where she worked before, she worked with a very quiet, unassuming guy whose job was a lifeguard at the YMCA. Years later, she had heard that the guy killed his girlfriend and chopped her up. Sometimes there are telltale signs, and sometimes it's just the "normal" everyday people we presume to know, like that shooter in Portland, OR.