Fiona MacKeown, mother of slain British teenager Scarlett Keeling, wants the Indian police to be prosecuted for trying to cover up her daughter's murder.

''I hope the Indian police are prosecuted for lying from the beginning. The police system is so corrupt that when the media pressure dies down, they will start messing about with the forensic results,'' said Fiona.

She also announced that officers in Britain had agreed to carry out a post-mortem on the body, as she wanted tests carried out in case forensic results from the two post-mortems that were conducted in Goa were changed, the Daily Telegraph reported.

Speaking at her home near the village of Meddon in north Devon, Fiona said, ''The police in Britain are going to do a third autopsy today.'' The half-naked body of the 15-year-old girl was found on Anjuna Beach in Goa on February 19.

The Goa police had initially claimed that it was a case of accidental drowning, after which Fiona called for a second post-mortem examination, which showed that Scarlett was attacked and was given ecstasy, cocaine and LSD on the night she died.

The police arrested two men-- Samson D'Souza, who was remanded in custody on suspicion of rape, and Placido Carvalho, who appeared in court on suspicion of drugging Scarlett.