Claiming that the Central Bureau of Investigation had illegally registered a murder case in the unnatural death of computer graphics teacher Rizwanur Rehman, the West Bengal government on Thursday sought the Calcutta High Court's rejection of the report.

Appearing before Justice Dipankar Dutta, Advocate General Balai Roy submitted that the investigating agency had exceeded the court's order by registering a police complaint and also sought rejection of the petition by Rizwanur's brother Ruqbanur.

Concluding his argument, Roy submitted that CBI had filed the complaint suo motu, though the court had only concluded that it was a case of unnatural death and asked it to investigate its cause.

He also submitted that if the CBI considered the writ petition as the basis of the FIR, the agency should have got the petitioner to sign the FIR and it should have also served copies of the FIR to the petitioner and the magistrate of the area where the body was found.

The CBI had said in its report that Rizwanur had committed suicide.

Rizwanur had married Priyanka Todi, daughter of industrialist Ashok Todi under the Special Marriage Act on August 18 last year and begun living with her at his residence from August 21.
 
It was alleged that Rizwanur and Priyanka were summoned to the Kolkata Police headquarters, Lalbazar, thrice at the behest of Todi and his relatives and she returned to her father's home on the third occasion on September eight following a written assurance by her uncle that she could return to her in-laws after a week.

However, she never returned. Rizwanur's body was found beside rail tracks on September 21.