IMO, the whole radio communication topic seems like just plain old misdirection and distraction. Radio transceivers are, first and foremost, used in the daily activities of nearly all uniformed officers, and for good reason. They allow what is essentially a voice group chat between individuals acting in connection with each other, without the need of a keyboard or knowing individual communication lines (such as cell phone numbers). They are malleable, in the fact that you can change frequency and code. The only caveat is that you need to know beforehand which frequency you all will be using, and which privacy codes will be used for those comms (either CTCSS or DCS).
The term ‘privacy’ code becomes misleading, because all it really does is filter that frequency by that code. Listening to a frequency with no privacy code set will let you listen to all comms on that frequency, regardless of code, though you cannot transmit to another radio using a code unless you have set your radio to transmit that code.
Alongside that information, many radios, especially higher end ones, like the Motorolas that many LEOs use, offer an ability to scan through multiple frequencies at a time monitoring for transmissions, so you are not limited to a single specific frequency either (not to mention you have multiple programmable channels to work with). I have a $260ish Motorola model of my own that I bought for work, it offers scanning through the programmed frequencies (8 programmable channels). My $35 Baofeng can scan through a user selected range of frequencies, even outside of those that are programmed to channels (100 programmable channels).
Now it has been said that radios were offered and not picked up. Why would you offer radios to units that already have radios? If they’ve already got radios, what need would they have for ANOTHER radio? Why would they pick up equipment offered that they’ve already got? C.Y.A., again.
Also, kind a side thought based on a video I was just watching, in the interview where (Roger) Patrick Young, Beaver County Chief Detective and ESU Commander, Young stated that they had had no contact from the Secret Service since “the last election cycle.” Were that to be the case, how did they even know to be where they were, especially with it being a part of their action plan. I cannot make heads or tails of this. If they’d had no communication, they would not have even known to be at the event, let alone to be where they were “planned” to be…
Edit: R.P. Young Interview