Mathaiah is one of the accused in the cash-for-vote case involving TDP leaders.
CID approached the metropolitan magistrate's court here seeking directions to three telecom service providers to submit details for further investigations of a case where Mathaiah has alleged that some leaders of the Telangana Rashtra Samithi (TRS) and the Anti-Corruption Bureau (ACB) of Telangana threatened him on phone.
The court today directed the three telecom service providers to submit details of CDR pertaining to Mathaiah, his father and his wife's cell phones from May 1 to June 20.