I have a better idea. Charge them with harboring illegal aliens. It is a federal felony.
[CALIFORNIA SANCTUARY STATE!] (drudge)
Since calipornia want to make the whole state a sanctuary zone just take a federal warrant to their governor and attorney general and arrest them for harboring and obstructing justice.
Would it be possible for charges such as...
Depraved indifference or accessory - for perniciously contributing to the situation that creates the crime?