Thugs acting as police in Serbia

So the the guy on the right is valid?

He also has rank emblems on his shoulders.

!rank emblems

One on the left not. Just a traitor willing to oppress their co nationals for a couple of bucks

The blank field of the grey badge should not be blank and should not state "1804" either as in the coloured version on the right. Maybe someone else has information what text belongs there. I'm unsure whether a black-grey version of the badge exists at all. In addition, the shades of the flag seem off in the black-grey version.

You can find depictions of the official badges in that document:

https://pravno-informacioni-sistem.rs/eli/rep/sgrs/vlada/uredba/2023/63/2

!Badges 1

They are probably cautious. They don't want to catch COVID

It's a real mystery.

I wonder who gave them the idea about masks

Can you explain what I’m looking at here? Are these people not official police?