Australian DNA expert Dr Brian McDonald remained on the witness stand for the second consecutive day in the Anwar Ibrahim sodomy trial.

McDonald, who is the fourth defence witness, testified yesterday that chemist Dr Seah Lay Hong's testing was not according to international standards following errors in labelling and not swiping the sample on a receptacle.

This follows the discovery of two out of 10 samples with faulty labels on the containers stating that they were tested on June 26, 2008.

This was despite the fact that the examination was actually carried outon the alleged victim, Mohd Saiful Bukhari Azlan, on June 28.

McDonald also testified such incompetency could have resulted in the chemist being “sacked” from his or her job.

It was also revealed that the Chemistry Department's forensic division has yet to receive the international accreditation required when it was placed on probation in 2005. The probation had been extended twice since 2010, and will end this October.

McDonald, who is also an evaluator for the 17250 international certification and standards, said that the chain of movement of evidence and the treatment of samples were vital in any investigation.

LIVE REPORTS

8.56am: Chemistry Department director-general Lim Kong Boon is seen in the witness room.

9.01am: The accused, Opposition Leader Anwar Ibrahim, arrives with his wife, PKR president Dr Wan Azizah Wan Ismail.

9.01am: Queens counsel Mark Trowell, who is holding a watching brief for the Inter Parliamentary Union, and Johor PKR chief Chua Jui Meng enter the courtroom.

9.12am: The public gallery, unlike earlier this week, has not fully occupied since yesterday. This is perhaps due to the technical nature of the testimony from the foreign experts.

9.15am: Court proceeding begins with High Court justice Mohamad Zabidin Mohd Diah presiding.

9.16am:

DNA expert Dr Brian McDonald called to take the witness stand to continue his testimony...