`Prosecutor’s Office did not start an investigation against Kostov`, Nikolai Markov, speker of the prosecutor`s office today. said. `Bulgarian Parliament, under its law initiative, concentrated its acts to gain rapid changes in the area of Bulgaria`s punishment law and strengthen the state organs, responsible for the criminality fight, for the last four years`, Ivan Kostov, outgoing Prime Minister, said in a statement addressed to Public Prosecutor Nicola Filchev on Thursday when they met. Nikolai Markov made also a statement to describe the meeting between Prime Minister and Main Prosecutor. Kostov and Filchev discussed the problems concerning the needed changes in Bulgarian law system.