with facebook warrant, just another signal this investigation is really focusing -- don't know what evidence he has for that warrant but to have a warrant you have to persuade a judge there's probable cause of crime being committed. investigation appears to be heating up but lawyers at odds at what to do now. >> you make important point. any communications medium can be used in crime. pick up phone and do activist a -- activity and phone is part of it. but wonder if mueller is seeing facebook not as one-off device but something where crimes or conspiracies occurred over long period of time. what light can you shed on that shayne? >> we don't know, there are a couple of points.