soldiers for the war. it's impossible for us to verify many of his statements but we continue to search for more witnesses. which brings us to the federal criminal police office near bonn this building houses germany's central unit for the fight. against a war crimes cost so on and his team deal every day with statements that are difficult to verify the police officers here investigate cases even if they've been carried out in syria. i've always wind up in all german law states that even when a non german citizen commits a crime against another on german outside of germany if the crimes are extremely serious like genocide war crimes or crimes against humanity then we can investigate it from here in germany. and that. if the suspected perpetrator is in germany so on and his team are called in statements from victims and witnesses are vital for the police officers here and play