Wizard,
The issue is these scum came here illegally and lied on their applications. Finding them out is extremely difficult because there are few witnesses remain alive. Heck, there were few witnesses at the end of WW 2 because of what these camps did. Many guards simply disappeared and were never found out.
Why it has taken so long is that no country is willing to accept this guy. We’ve known since probably before 2004 but haven’t been able to deport him because we can’t find a country to take him. If I were king for a day I’d send him to Israel. They’d take him and give him the justice he deserves.