A ? about 'right to privacy.' re: border issue

So, I'm listening to the audio of a HHS director being grilled by a GOP at a hearing.

Q: 'Why can't we visit the facilities, talk to the kids or take pictures?"

A: "Because we have to respect their right to privacy.

My questions:

1. Why does an illegal immigrant have a right to anything?

2. If people who break the law maintain a 'right to privacy' then why don't US citizens who get arrested have the same right? They get photographed and even if they are found innocent in trial their pic is in the paper at arrest.