India, March 28 -- The 31-year-old trainee doctor murdered at the RG Kar Medical College and Hospital on August 9 last year was raped before she was killed, not gang-raped, the Central Bureau of Investigation (CBI) told the Calcutta high court on Friday citing its investigation and the report of a 14-member medical board.

The agency, however, maintained that there was a conspiracy to destroy evidence in the rape and murder case and informed the single bench of justice Tirthankar Ghosh that phone call records of three suspects are under scrutiny and 24 people, including some RG Kar Hospital staff, are being questioned.

CBI also submitted its case diary to the bench along with its status report.

While hearing a petition filed by the vict...