Sorry is there evidence that the DHS were actually involved here as claimed in the author's twitter feed? Or do we take this at face value? edit - and what doe

Sorry is there evidence that the DHS were actually involved here as claimed in the author's twitter feed? Or do we take this at face value? edit - and what does a DHS visit look like? Do they knock on your door at 6am or leave a card to call them back? Sorry I've never been in this situation before so I'd be interested in more details on that side of things.