Just go into a small police house/station and there are (seen in this uploaded picture) lockers everywhere and then there are those 2 where loot spawns on the top. Mostly a pistol suppressor or an ump magazine. (sorry i don't exactly know the new name of the weapon yet)
And in this bug you can loot those items. It's impossible. I tried everything from tabbing my way through the outside wall to climbing on the right locker to be able to loot them. Nothing worked and it just seems like a bug for me, because this is legit loot. It would be awesome if you guys could get that fixed.
Wonderful game btw. Love it !