Don't have a lot of faith in them actually charging him with anything. Look what happened to the other people they caught and let go.
NOTE: It was NOT the work of the Federal Prosecutor which has lead to the acquittals in the cases Mzoudi and Motassadeq. Still, there are processes against both going on. It was the judges which rather believed "in dubio pro reo" instead following the hints. I´m sure that both terrorists will face penalties. If not in Germany, than in some other country to which Germany will extradite them.