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Maritza Perez Huerta attended her first protest this week.

Service Employees International Union California President David Huerta was injured and detained while documenting an immigration enforcement raid in downtown L.A. last week.

That morning she went to another location where union leader David Huerta had been arrested.

On Friday federal officials arrested Huerta, the president of Service Employees International Union California, on suspicion of interfering with federal officers.

Laurie Levenson, a former federal prosecutor who is now a professor at Loyola Law School in Los Angeles, said that, while the cases involving explosives and cinder blocks are certainly “serious crimes,” the lesser offenses such as those alleged against Huerta are meant to send a message to protesters: the rules are different now.