SURAT THANI, Sept 23 – Police have used superimposition, a specialised forensic medical technique, to compare an image of a man captured by a surveillance camera with the pictures of suspects and expect to find the murderers of two British tourists on Ko Tao in a few days.

The superimposition technique was applied to two of three suspects who allegedly molested Hannah Witheridge, one of the murdered tourists,on Sept 15, the night of the murder.

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