[trealira]

Ostensibly, it's to prevent attacks, according to the author of the bill:

“At 25 feet, that person can’t spit in my face when I’m making an arrest,” Fontenot said while presenting his bill in a committee earlier this year. “The chances of him hitting me in the back of the head with a beer bottle at 25 feet — it sure is a lot more difficult than if he’s sitting right here.”

But it's very easy to see how it will also make it harder to record videos of the police. I bet that's at least part of the reason why they're doing it, even if they won't say so.

(I assume that Fontenot is speaking in the first person because he's a former law enforcement officer.)