Times probably call for these old rules too.
1. Don't rat on your friends/compatriots.
2. Don't rat on yourself.
3. If they're still asking, they don't know.
I'd also add good advice from one of the top public defenders in Los Angeles: Do not give any false statement to police that they could corroborate. He gave the specific example of having an immigrant in your home and ICE agents come knocking.
If you say, "I don't know them" or "haven't seen them in weeks" but your phone or other evidence could prove false, that's a misdemeanor that could be made even more serious. Just say, "I can't help you" over and over again if necessary.