Catching a criminal is by no means easy, but there’s something we take for granted in any crime: that the criminal has a face and a name, that they used a specific weapon on a specific target, and that the crime had ended once it was complete.  

But what about a crime without a clear perpetrator, an unseen weapon, and an effect felt by far more people and far longer than it may have intended? What evidence would you present to a jury if their weapon were invisible, and their victim not one but one million people, most of whom may not even be aware they’ve been attacked?