David Huerta, president of SEIU California, has been charged with conspiring to impede an officer during an immigration demonstration in Los Angeles.

Service Employees International Union California President David Huerta was injured and detained while documenting an immigration enforcement raid in downtown Los Angeles Friday, labor union officials said — prompting protests and calls for his release.

The complaint describes law enforcement’s view the events surrounding the arrest on Friday of the president of the Service Employees International Union California at a protest over an immigration raid.