a -- german officials identifying this man a tunisian migrate the focus of their identification. amari's identification papers found inside the truck. this has president elect donald trump makes his first public comments today on the attack. listen. >> it is an attack an humanity, that is what it it is. it is an attackon humanity. and it's got to be stopped. >> what more do where he know about this man? who is the key suspect. they know don't if he's the only one. but this is who they are hunting for. >> reporter: and we're learning more about his past as well as potential security failures. here in germany he had at least