Like searching for "how to poison someone" on Google.
Or the perps STOP doing things they normally do.
Like not showing up for work the day after someone is killed.
So Nellie just for no reason started using a HAM radio in 2016.
It would be interesting to find out if she is still using the HAM, or suddenly stopped.
Exactly.
You have to file federal paperwork for a license to the FCC. Social security number and all.
There must be some means in FedGov to flag a person and then have any filing in FedGov pop up and signal to someone who cares that this person of interest is doing such things.
Aside from that, traffic on the HAM bands is pretty low on average. Not tough to build an algorithm to pick it up, sample it, and then run it through a pattern matcher to detect encrypted comms. From there its a straight ‘fox hunt’, where you triangulate to find the transmission source.
I guess you can rig a system that would ‘spoof’ a radio signal. If you were to fox hunt that, it would be obvious that the signal you isolated was wired to a box or a computer that transmitted and received messages from some other physical location. Then it would be obvious something was very wrong.