Louisiana Attorney General Liz Murrill is pushing forward with her efforts to force Orleans Parish Sheriff Susan Hutson to drop a longtime policy that generally prohibits deputies from directly engaging in federal immigration enforcement within the city’s jail.

A federal court will now determine whether to allow the state of Louisiana to join a 2011 federal suit that resulted in the policy and whether to throw out the policy altogether. A hearing has been set for April 30.

The sheriff’s policy stems from a 2013 federal court settlement in a civil rights case involving two New Orleans construction workers picked up on minor charges in 2009 and 2010.

Mario Cacho and Antonio Ocampo sued after they were allegedly illegally held in the city’s jail past the completion of their sentences. The two were held at the request of U.S. Immigration and Customs Enforcement. The agency issues such “detainer” requests to local law enforcement agencies, asking them to hold onto arrestees who are suspected of immigration violations.

Local agencies are only supposed to honor the hold requests for 48 hours, after which they should let detainees free. But in 2009 and 2010, then-Sheriff Marlin Gusman detained Cacho and Ocampo for months, according to legal filings in their case against the office.

Ocampo and Cacho settled the case with the Sheriff’s Office in 2013, and Gusman agreed to adopt a new policy on immigration investigations. The resulting policy blocks the agency from investigating immigration violations and from detaining immigrants for ICE without a court order, except in certain cases where they are facing charges for a small number of serious violent crimes.

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