Rumour is that Loomer may have reported him.
Why would anyone have to report anything? In my naivity, I imagine there is a government database where you can just run a query and get a list of everyone who has overstayed their visa at any moment in time. But I guess that would be giving the government too much credit.
If you don’t show up for your immigration hearing, then it tells me you’re not serious. I don’t care who you are.
He may have been doing this as research on what it’s like to be arrested and deported.
So he claims.