@Delph, is it on the border between Poland and the Czech Republic (Zaolzie area)?
The guy is a member of the Kielce branch of Samodzielny Pododdział Antyterrorystyczny Policji
Awesome, Chemikiem! You are correct :) Yes, SPAPs are local counter-terrorism units. That guy's T-shirt with "SPAP" written on it was the main clue. But johnny_reb has a good eye for detail too! Btw, do you know why there's a wild boar on his T-shirt?
I'm not sure what's going on though......
Yes, this could use some more clues... Police officers from such units can't be identified publicly, because they are dealing with organised crime - they have to protect themselves and their families. They may also take part in undercover operations so identifying them by the public could mean the end of their career. And yet, the guy from Kielce is wearing his SPAP's T-shirt outdoors in broad daylight with many people around. You wouldn't see him and other SPAP guys wearing it in the street. There are also other clues in the photos for people with keen eyes for details :)