A second activist will file legal papers tomorrow announcing his intentions to sue the city of St. Paul over police action tied to the Republican National Convention. More than 800 people were arrested during last month's RNC, and more civil-rights lawsuits are likely. But taxpayers won't pay any of the legal fees or losses stemming from the suits. That's because last year, the city of St. Paul negotiated a police-liability policy that will cover up to 10-million-dollars in damages.