Who let Edward Mazur leave Poland in 2002?

Katowice prosecutors, in south-western Poland, are convinced that there was sufficient evidence back in 2002 to make Edward Mazur remain in Poland. They are conducting a probe to determine whether the decision to release the businessman, suspected of contracting the killing of Poland’s police chief, was a mistake or a conscious action. If Mazur is extradited to Poland he will also have to face the Katowice prosecutors, who have already put questions to several dozen persons. No charges were pressed yet against anyone.
Source:polskieradio.pl