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.

On the heels of major shows of force by federal immigration agents in Southern California, a judge is set to rule in a lawsuit seeking to halt immigration raids in Los Angeles.

As Judge Maame Ewusi-Mensah Frimpong’s ruling rippled across the region, the federal government requested an immediate stay, pending appeal. Here’s what you need to know.