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Green-space crusader Steve Coleman has long had prickly relations with the Metropolitan Police Department’s Environmental Crimes Unit. Coleman, director of Washington Parks & People, constantly complains that the cops don’t do enough to stop illegal dumping in public parks. Last week, police got tough, but not with polluters: On April 2, they arrested Coleman for disorderly conduct. Coleman says that earlier that day, an officer had phoned Parks & People to say that unless he attended an emergency meeting about Watts Branch Park, he’d be subject to arrest. At the meeting, Coleman asked Investigator Paul Kurgan about the alleged threat. Kurgan says he denied having issued such a warning—and when Coleman refused to “calm down,” Kurgan says, he cuffed him. “He crossed the line,” Kurgan says. Coleman counters by e-mail that the arrest was meant “to squelch my complaints about his unit’s poor enforcement.” —Annys Shin