Cops know. Snitches get stitches.
They could potentially deport American citizens without due process. They have to prove one is here illegally in order to lawfully deport someone. No way around it. The damage was done when our government and media encouraged them to come here illegally.
It must be proven that one has no right to be in the United States in order to be deported. Due process. Otherwise they can deport whomever the fuck they want to. Including (You).