SAN FRANCISCO (AP) – Federal immigration authorities confirmed they had no contact with a Mexican national suspected of fatally shooting a Northern California police officer until the man’s arrest last week.

The U.S. Immigration and Customs Enforcement emailed a statement to the San Francisco Chronicle on Sunday saying the agency has put immigration detainers on Gustavo Perez Arriaga and his alleged accomplices.

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Arriaga, who was in the country illegally and had previous arrests, was arrested Friday on suspicion of the killing of Newman police Cpl. Ronil Singh.

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The officer’s death is fueling a national debate over California’s sanctuary policies. President Trump seized on the case in a call for tougher border security.

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Singh was a 33-year-old husband and father of a 5-month-old boy. Viewing and funeral services are set for Friday and Saturday.