Questioning the legitimacy of the SIT probing the Pari case, Ganjam-based Bharatiya Bikash Parishad has filed a miscellaneous case in the Orissa High Court seeking polygraph test of SIT chief Arun Bothra and the doctors, who conducted postmortem in the case. The Parishad also reiterated its plea before the HC for a CBI probe into the case, which is likely to be taken up on Thursday.