The court ordered that the matter be reinvestigated and also sought a scientific scrutiny of the two voices in the telephonic conversation, said to be between Thakur and Yadav.
Chief Judicial Magistrate Sandhya Srivastava dismissed the police report, which in October 2015 concluded that there was no case made out against Yadav.
Thakur, holding the rank of an Inspector General of Police in Uttar Pradesh, on July 10, 2015, accused the Samajwadi Party chief of calling him on his cell phone and threatening him with dire consequences.
He submitted a voice recording of the alleged conversation between the two and even lodged an FIR on July 11.
The state government suspended the Indian Police Service officer on July 13 and ordered a slew of investigations against him.
Alleging victimisation by the Akhilesh Yadav government, Thakur petitioned the Central Administrative Tribunal (CAT) against his suspension.
The CAT ordered the revoking of his suspension. Thakur was reinstated, though a number of cases and probes are pending against him.
The investigating official in the telephonic threat case had, in his final report, claimed that the officer raised the matter for "cheap publicity".
Thereafter, Thakur moved the CJM court against the police report.
