Mr Alanis's death, and the violent clashes that ensued at those cannabis farms, are the latest examples of the kind of chaos that has swept across Southern California since the beginning of June, when immigration raids began to intensify in the region.

(Reuters) -A U.S. citizen and Army veteran who works as a security guard at a California cannabis farm said on Wednesday that U.S. officials arrested him during an immigration raid last week and held him for three days without explanation.

The Border Patrol began conducting operations in Sacramento on Thursday, as two federal court rulings have ordered them to stop warrantless raids.