SORNA was signed into law in 12/20/2012 (Retroactively) so they could do something illegaly and make it sound good. But to people that were convicted after 12/20/2012 it is not illegal. So yes in my opinion it would be double jeopardy. The courts know what is going on. I think SCOTUS will reject the apeal because they rejected the SUDER vs DOE case.