BANGKOK — A top forensic scientist testified to the court today that DNA traces found on a garden hoe reportedly used in the murder of two British backpackers last year did not match the two defendants.

In what could prove a turning point in the murder trial, Central Institute of Forensic Science chief Pornthip Rojanasunand told the court her agency’s inspection of the garden hoe found DNA traces of two men, neither of whom were the two Burmese men accused of the murders.

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