Only a very few shootings of officers (or shooting by officers) become national cause celeb and get that kind of national coverage (and note that as of this point, it happened less than 48 hours ago, attention will fade). It is my recollection that the updates of a shooting of an officer will repeatedly appear on the nightly (local) news (hospital updates, autopsy details, funeral plans, return to work, reporting about the incident, plus any trial).
Another way this is different is that the general public understands that sometimes cops get shot at and when bullets fly people get wounded and killed. The incident is shocking and tragic, but not super surprising when police encounter armed suspects. Football players get tacked all the time. At least a hundred similar seeming tackles happen in each game. There a dozen or so pro football games each weekend of the season, a few hundred college games, and thousands of HS games, each with about a hundred tackles and we *don't* expect a player to have his heart stop. (Players tear ligaments, break bones, and have concussions all the time from hits. We expect those. We can argue about protection and if there are too many. We *don't* expect a tackle to stop a player's heart because it is extremely rare.
That it happened on a nationally broadcast professional game made it more prominent. If it had been part of a D3 game recorded only for local TV, it would be noticed but not made such a deal of. The fame of the player and his team made it more noticed.
(I recall an incident involving a HS (I think) hockey goalie that was hit in the heart with a puck at just the wrong time and died.)