She noted that round marks on Teoh's neck indicated 'manual strangulation'.
She further said that Teoh's skull fracture was not typical of an injury from a fall, adding that injury to his anus could be caused by penetration with an object before his fall.
This, she said, was based on pictures taken from the site of his fall.
She added that Teoh's death was 80 percent homicide and 20 percent suicide.
Pornthip was testifying as an expert witness at the inquest which is being held to determine the cause of Teoh's death.
She is the director and co-founder of the Thai Justice Ministry's Central Institute of Forensic Science and is well-known for investigating complicated homicide cases.
Teoh, the 30-year-old political secretary to Selangor executive councillor Ean Yong Hian Wah, had been summoned to the Malaysian Anti-Corruption Commission office at the 14th floor of Plaza Masalam to be questioned over the irregular disbursement of state funds on July 15.
He was found dead on the fifth floor service corridor of the building the following day.
[Source : Malaysiakini]