Again, the media doesn't know that M-14s are NFA items and what he probably had was an M1-A. But it's not black and scary like those fully semi-automatic ARs that the military uses and that civilians can buy without a trace.
Not to dispute your last sentence there, but the nomenclature regarding the "M-14" is not exactly unambiguous. M1-A, as I understand it, is the Springfield trademark for their semi-auto version (copy) of the M-14. On the other hand, for example, James River Armory's rifle series is denoted as M-14 albeit that they are (NFA compliant) semi-auto (mine - one of the older Rock-ola versions - has a notch gap there near the back of the receiver where the full auto selector mechanism was removed). One can see these - the newer versions - advertised, say, here: https://www.classicfirearms.com/m14...-stock-bula-parts-jra-national-match-edition/ .
[edit to add]
The officer killed, Terrance Calloway, was a 30yr decorated veteran on the force, who was not in the warrant serving team, but rather died trying to rescue his fellow officers. RIP.
Et lux perpetua luceat ei.
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