Thai murders: DNA lost, say police

Crucial DNA evidence in the case of the murder of two British backpackers cannot be retested because it no longer exists, Thai police have told the BBC.

The evidence is central to the prosecution case against two Burmese migrants on trial for killing David Miller, 24, from Jersey, and Hannah Witheridge, 23, from Norfolk.

The defence had wanted it re-examined.

Jonah Fisher reports from the courthouse on the island of Koh Samui.