A man with no motive is a man no one suspects. Always keep your foes confused. If they don’t know who you are or what you want, they can’t know what you plan to do next.
It’s always the ones you least suspect, the ones you trust the most, that hurt you. They wait until your guard is down and then wham! In my case, it was tequila.
Sooner or later, everyone looks guilty. And given the right circumstances, the right motivation, who knows what any of us might do?