I think he filed for his Visa using a different name all together (dont know how that would be possible, but that's what i got from the story). Perhaps he used his mom's last name or other relative that was already living here to make the process easier (i dont know i never got a Visa lol). However from what he said he didn't commit identity fraud to enter the US, but he may have committed fraud in order to get his Visa in the first place. I dont know how big of a crime that is, but he wasn't impersonating anyone else. He instead used a made up person all together.