I'm neither defending or admonishing Andreus. I didn't know him, and I never spoke to him...
... but there are a LOT of illegals around where I live, and this is what I've learned about them in the last 20 years:
They have very convincing FAKE ID. They know our systems better then we do, and take advantage of them to get governmental food, housing, education, and medical. They don't give you their real names, or their real birth dates. They will often claim to be single here, while having a wife and kids back home. They lie about how many dependents they have to get less taxes taken out of their checks.
The sources Johann used was for American citizens who play by the rules, and want to be found. They don't apply for those who are here illegally and do not want to be found.
Or he could have been someone who is paranoid like me, and NEVER uses their real name anywhere on the internet. Facebook, Myspace, various E-mail accounts - I never give them my real name.
Just because you couldn't Google him doesn't mean he was never here. He just didn't want to be found.