The AP article for those that don't want to listen: https://apnews.com/article/raiders-nfl-vegas-police-allegiant-stadium-5239b9962c23a6512fa2f694add9b9ea

The highlight for me is this:

The Las Vegas Police Protective Association, with the backing of the department, said they are concerned such technology compromises the officers’ privacy.

It's worth noting they're only doing this for workers, not for attendees. The police would presumably by fine with it if it were just attendees and not workers, because it wouldn't include them.

they say giving their biometric data to an unaccountable company crosses a line.

The company is unaccountable‽
That's some projection.

Las Vegas police are refusing to comply with the NFL’s new plan to use facial recognition technology for stadium employees during games. Even though police often use facial recognition to identify suspects, they say giving their biometric data to an unaccountable company crosses a line.

Dear cops: Oh now we worry about unchecked power and lack of oversight in the deployment of surveillance technology? Please. May as well join the surveillance dystopia with the rest of us, you helped usher it in. Tell me again about your robot dogs and your Stingray devices why don't you.

You're not wrong, Walter, you're just an asshole.

And now I'll never go to a game again. Fuck'em.

Every state wants a monopoly on violence. The more powerful the state, the less there are entities that could opress you except the state itself. So it's not unexpected that the cops would object to have a "competitor" with facial recognition technology