http://www.bbc.com/news/world-europe-36874497
“His name has not been officially released but he is being named locally as David Ali Sonboly.
He has also been referred to as Ali David Sonboly, or David S.”
I have seen that it might not be David at all, but Da’houd.
A lot of news sources still stick with “David S. making him seem like a Brit or an American or somesuch.