Full camo in a city environment always makes me smile. If they are not Military, I find it funny personally. If you want to blend into the environment, jeans, a plain shirt, ballcap with no logos on it and non-tactical glasses would be better camo.
Since I keep my hunting gear sealed up to keep from being coated in exhaust and 'city' smells, I can never understand wearing your hunting clothes as everyday attire. But then, that is just me.
As for this report, if they did actually detain him for his outfit, then they were seriously mistaken and should be held accountable. But as with all reporting, there is the story they told and the story that actually happened. Not always the same.