For those unclear on yet interested in this issue, you may wish to re-read the Constitution, paying attention to when them specifically mention citizens, as opposed to the more general person or people.
Also consider that not all aliens - illegal or atherwise - are treated equally in all matters. For example, one very basic factor is whether they managed to reach home base before being tagged. Some folk find it hard to imagine why certain aliens interdicted at sea can be held for years in federal detenion centers, without ever have been acknowledged as having entered the country.
According to the article, the police have the option of applying for a ‘criminal justice visa’ which lasts for the duration of the criminal procedings, but in this case they elected not to.
Unfortunately, the article lacks specifics, such as the names of most of the people involved.
No, you would only have to find a cope, prosecutor, judge, and jury who are willing to enforce the law prohibiting battery. None of them would have to make any judgements regarding what level of “threat” it is “to this country” whether or not in relation to illegal immigration.