The final report was submitted to the court of Chief Judicial Magistrate (CJM), Khagaria, Trilokinath Tripathi by SIT today, police said.
SIT has chargsheeted 37 persons, majority of them local leaders and workers of RJD, LJP, NCP and CPI-ML and over a dozen contractual teachers in the incident, the police said.
The report, drawn up on the basis of findings during probe, highlights the 'doubtful' role of RJD Rajya Sabha member Ramkripal Yadav and controversial leader Rajesh Ranjan alias Pappu Yadav, they said.
Protestors had shown slippers at the CM during the meeting, burnt documents in the district magistrate's office and damaged several vehicles. Later, Ranbir Yadav, husband of Khagaria JD (U) MLA Poonam Yadav had snatched a stengun from a policeman and had escorted the CM to the stage for the meeting.
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FIRs were later lodged against 75 persons in coonection with the incident.
The SIT report came at a time when the state is in the grip of massive protest by contractual teachers for pay parity with regular teacher and regularisation of job.