If he's from a hackers collective, why didn't they just hack into the live feed?
Dutch news in the news.
It didn't take long for rumours to fly about this young man being a confused student at Delft Technical U. Completely without sources, of course. The gunman's manners are spotless. Police press conference now.
Edit to add: 19 y/o man from Pijnacker, born in Zoetermeer. I know those places, they do strange things.