And with good reason. His true identity might be used against him. He is a Syrian refugee who just got arrested on suspicion of having committed war crimes.
As we all know, Germany will allow anybody from anywhere in the world to enter the country as a Syrian refugee (no passport or other identification needed) but being a war criminal who is believed to have killed 36 people might slow down his asylum seeking process considerably. And that would be inhumane.
German police are currently investigating some 30 cases linked to war crimes committed in Syria and Iraq.