Bosnia’s prosecutors said on Thursday that Bosnian Serb leader Milorad Dodik was being investigated for attacking the country’s constitutional order, the day after he signed laws banning the state judiciary and police from its autonomous Serb region. A state court last week sentenced Dodik, the Serb Republic’s president, to a year in prison and banned him from politics for six years for suspending rulings by the constitutional court and international envoy Christian Schmidt, who oversees implementation of the 1995 Dayton peace treaty.