the youngsters and arrested five of them, just in november. including the ring leader abualla. but some of the younger food soldiers still hadn't gone after because they perhaps didn't have enough evidence to win a conviction in their minds. while the fact they can't go after them and put them under more surveillance for a more sustained amount offensive line time has clearly led now to this attack going through. and the worry is it is not just him who could launch another attack it is other foot soldiers in this network. >> based on paul's reporting here they have a mountain of information on this guy and apparently on this isis network inside germany. you have been part of the aftermath of incidents similar to this. what are german officials and german intelligence doing right now to catch this guy and to make sure another attack doesn't happen in the next few days? >> well the german police are going to prosecutors right now