Why have immigration agents detained this citizen three times?

“On May 2, agents followed Leonardo Garcia Venegas back to his home because they didn’t believe his claims of citizenship or that the REAL ID he showed them was legitimate. It was familiar territory: He’d already been detained twice by immigration agents — once last May and another time last June. Except this time, after cuffing him, they shackled his hands and feet. The same week of Garcia Venegas’s third detention, a top immigration official said at a border security conference that arrests “wh”