The four accused in the Nido Tania killing case told a Delhi court on Wednesday that the Central Bureau of Investigation has withheld “essential documents”, including statement of witnesses recorded by the Delhi Police.

The accused told Additional Chief Metropolitan Magistrate Pritam Singh that the CBI has withheld the statement of witnesses recorded by the Delhi Police.

They submitted that without the complete charge sheet, the accused cannot defend themselves.

The court then issued a notice to CBI asking it to appear before it on May 9.

The CBI had on May 2 filed a charge sheet against seven persons, including three juveniles, booking them for causing the death of 19-year-old Tania, a student from Arunachal Pradesh and the son of an MLA.

The accused — Farman, Pawan, Sunder Singh and Sunny Uppal — have been charge-sheeted for the offences of culpable homicide, illegal confinement under the Indian Penal Code and the provisions of the Scheduled Castes/Scheduled Tribes Atrocities Act.

While the Delhi Police had booked them for murder, the CBI dropped the charge in its charge sheet on the ground that his killing was not premeditated but as a result of an altercation over breaking of a glass counter at a shop in south Delhi.