 A few days after they'd arrested Daniela Kletter, the police moved in again. They'd worked out where one of the other two suspects, Burkhard Garweg, had been living, a caravan site tucked in next to a railway line in the eastern part of Berlin. But Garweg, alerted by that text message, was long gone. It's quite a small area, not a big space, just a couple of narrow streets, and everywhere are parked.