Thursday, January 7, 1999 Published at 21:27 GMT
Heads roll over Anwar beating
Anwar's injuries caused international concern
Inspector-General of Police Abdul Rahim Noor said he assumed "full responsibility" and would resign effective from Friday.
But Mr Anwar's supporters say the resignation does not go far enough.
Just days after Mr Anwar's arrest the police chief gave assurances that the former deputy premier was "safe and sound" in custody.
The dramatic resignation followed a long-awaited report from Malaysia's attorney-general on Tuesday which confirmed that police had injured Mr Anwar after he was arrested on charges of sex and corruption.
The report said a police investigation had failed to identify the person or persons responsible for the injuries.
The prime minister has been under growing pressure from opposition politicians and the Malaysian Bar Council to find those responsible for the assault.
Dr Mahathir had earlier suggested that Mr Anwar may have inflicted the injuries upon himself.
DNA witness cross examined
Last week, Dr Lim Kong Boon testified that semen stains on a mattress seized from a smart apartment block matched Mr Anwar's DNA and linked him to a variety of sexual trysts with both men and women.
The defence had previously implied that the police may have extracted semen from Mr Anwar after he was beaten unconscious on the night of his arrest.
Dr Lim's evidence is key to the prosecution's case, and having flown in DNA experts from Britain and Australia to assist them Mr Anwar's defence team was keen to undermine his credibility.
Questions of credibility
"No," said Dr Lim.
Had any of his research been published in any scientific journals? Again, "No," the doctor replied.
The lawyer then tested him on a term which he said was well known amongst people in the field: what was the "stochastic effect?" Dr Lim said he had come across the phrase but could not remember its exact meaning, prompting laughter from the public gallery.
"They've been destroyed," replied Dr Lim, causing gasps around the courtroom. "It was not our practice to preserve such slides."
Mr Anwar's lawyers are seeking to prove that the former deputy premier is the victim of a political conspiracy aimed at destroying his career.
The trial continues.