SAN FRANCISCO — Two years after the California Supreme Court OK’d warrantless cell phone searches, a new suit aims to force a closer look at the issue.

The American Civil Liberties Union Foundation of Northern California and Pillsbury Winthrop Shaw Pittman filed suit Wednesday against the city and county of San Francisco and Police Chief Gregory Suhr on behalf of Robert Offer-Westort, a civil rights activist whose cell phone was searched after he was arrested for camping in a local plaza.