Chennai: Dravida Munnetra Kazhagam (DMK) Rajya Sabha member R. Girirajan has filed nine separate writ petitions in the Madras High Court, seeking a directive to the Directorate of Enforcement (ED) to initiate money laundering investigations against several senior leaders of the All India Anna Dravida Munnetra Kazhagam (AIADMK). The petitions urge the court to direct.