Duh! He was video taping the event, in case ICE or CBP got out of hand, which is perfectly LEGAL in the entire Nation, and a protected constitutional right, ruled by several courts including the Supreme Court, several times. Same with whistles blown, and following ICE via their cars or walking...ALL RULED CONSTITUTIONAL, and again just confirmed again recently by the Courts.
This was CBP, not ICE and was a few blocks AWAY, from the ICE operation to arrest the two alleged criminals. CBP was guarding the peripheral. No one at this spontaneous gathering where they were, was remotely close to the ICE operation, where they were at.
And as I told you, concealed carry holders usually strap that gun on right after they have brushed their teeth, and before locking their door behind them. It is routine.