San Francisco police investigating the murder of a pimp begin to suspect the family of a young girl whom the victim had been prostituting and obtain a warrant for cell phone location data from the girl’s father and cousin. But! The warrant application talks primarily about the father with barely a mention of the cousin. No worries, says the Ninth Circuit; that wasn’t enough to support probable cause, but the police were entitled to rely on the warrant in good faith. Dissent: Come on, guys. The cousin didn’t even live in San Francisco, and the warrant application didn’t bother to suggest he was in town the day of the murder.