Interesting conspiracy theory could be drawn from this....

The guy caught was a Russian, and obviously they've found that he's bought a load of Dortmund shares since the blast to make a profit.

What if this was a Russian plot to put additional pressure on Merkel ahead of elections this year, blaming it on Muslims or whatever, and the share purchase was to cover up Russian involvement in case he was caught.

Almost certainly not, but I've heard crazier theories