Seventeenth witness Nor Aidora Saedon, 52, testified that the bloodstain samples were labelled “Y1” and “Y8”, Bernama reported.

Nor Aidora, a senior director at the Selangor chemistry department’s Quality Management and Research Centre, revealed this while making her deposition on the 18th day of the inquest into Zara’s death before coroner Amir Shah Amir Hassan.

“The bloodstains were consistent with each other and matched the DNA profile of a specimen obtained from Zara’s bone. This indicates that the identified DNA originated from the same individual,” she said.

The chemist, who has 26 years of experience, also noted that bloodstains found on a sheet of paper labelled “WK15(9)(a)” and trace DNA detected on a book labelled “WK13” were consistent with Zara’s DNA.

She said the DNA of at least two other individuals was also found on Y8, as well as on a pencil case, a book, and a blanket belonging to the teenager. However, the identities of the other DNA contributors could not be conclusively determined.

Earlier, Nor Aidora told the court that on Aug 11, she received 37 exhibits, including paper wrappings, evidence envelopes, and specimen bags containing items such as blood-stained cotton swabs, fingernails, and bone samples from a police officer.

She said she later received another evidence bag labelled “Y8” from another officer on Aug 20, adding that all exhibits were in perfect and intact condition.

“I can confirm they were not tampered with, as each item was sealed when I received it, and I personally opened every exhibit for examination,” she said.

Zara, 13, was pronounced dead at the Queen Elizabeth Hospital on July 17, after being found unconscious in a drain near her school dormitory at about 4am on July 16.

The inquest continues.