How does wearing camo help you fire a rifle accurately?
In any event, surely special operations requiring camouflage constitutes about a thousandth of one percent of police work.
But in those circumstances camouflage is absolutely the last thing you want. Seeing as a potential assassin will be trying to camouflage themselves you really don’t want your police snipers to look like them.
Not really. The cops all know where each other is. Or should. The guy who’s not where a policeman is known to be is probably an intruder / threat.
There is urban camo pattern clothing which might have legit use for police snipers in mass crowd situations that might attract mass shooters. But that’s about it, and the incremental loss of effectiveness by banning camo always and ever for all forms of law enforcement would be a teeny rounding error in exchange for starting to roll back the forces of Fascism.