A note from your mother...?
I'm guessing they asked to see their green card.
Producing a valid green card would be something required under law as basic proof/authorization to work for a non-citizen, unlike a student or tourist visa.
I’m guessing this is harrassment, busy work by Holder in the JD, showing us he can act as the thug he is, but which will be another dead end for the department.
Yes, for some reason they want us in a civil war, in the streets. I wonder why?