Man is arrested after (he alleges) ex-girlfriend falsely told police he’d attacked her. Case dropped after ex-girlfriend thrice fails to show up for hearing. Man sues the Philadelphia District Attorney’s Office (among others). But, says district court, to sue the DA you need to show that they had a “custom or policy” leading to your injury, and you haven’t done that. But if the man can identify the detectives who actually arrested him, maybe the case can proceed against them.