In this high tech digital age, the perps will be tracked down and arrested very soon. Theres no such thing as a perfect crime.
Yeah and Hillary is going to be prosecuted......../s
Calls are probably made from drop phones. Prepaid cell phones you use and discard. Just like the terrorists they are.
Make no mistake, violence or threats of violence to effect political change is the very definition of terrorism.
The Democrat party is now a terrorist organization, especially if high level officials are (even tacitly) condoning this behavior among their staff.