FBI and other sweeps have repeatedly turned up nothing localized, so whatever is transmitting is likely not in the building(s) unless they are passive-reflector

FBI and other sweeps have repeatedly turned up nothing localized, so whatever is transmitting is likely not in the building(s) unless they are passive-reflectors. The general public probably have no idea just how advanced directed energy weapons are these days, which is what I am guessing this is, but I think they might be much longer range than people thing. Of course it's all speculation.