So a small update. We found an "evil twin". This person is a sex ofender tier 2. With the same physical descriptions (race, hair and eye color, height, weight, some tattoos) the birthday is different but for a day. This person is 7 years older tho and of course with the same name but is safe to say that he doesn't look like my fiance. Additionally, there is no criminal records or anything awa related that show he (my fiance) has had any issues with the law, besides a speeding ticket that is no longer showing in his registry.
Could that resemblance with that one person be enough alarm to ask him for biometrics?