The doctors of Kilpauk Medical College hospital, who conducted the post-mortem, have certified that her death was due to hanging.

It may be recalled that Ravi and his wife Chitra were taken to the police station for interrogation. While Ravi was send back, Chitra was dropped the next day. Later, neighbours found her dead. A suicide note found near the body said that she had been raped in custody.

There was tension yesterday morning as people gathered in the premises of the KMC hospital. The post-mortem was conducted amidst heavy police security. Two cameramen videographed the entire proceedings. While one cameraman was deputed by the police, the other cameraman was deputed by the Ponneri Revenue Divisional Officer.

The body was later handed over to the relatives. Ravi is still in the hospital.

Meanwhile, Chief Minister M Karunanidhi hasordered a CB-CID probe into the circumstances surrounding Chitra's death.

Five policemen had been suspended on Tuesday for contravening rules by taking a woman to the police station after 6 p.m.

In a related development, All India Anna Dravida Munnetra Kazhagam general secretary J Jayalalitha has demanded the arrest of the accused.

``The Government should not stop with an eye-wash drama of suspension of the police personnel who committed the ghastly crime,'' she said.

As there was no charge at all against Chitra, ``dragging her to a police station in the dark hours of the night exemplified the deterioration of law and order in Tamil Nadu,'' Jayalalitha said.