http://www.dailymail.co.uk/news/article-2762055/Thai-divers-hunt-missing-murder-weapon-tourists-flock-spot-British-duo-murdered.html
Police today also began searching for a second weapon involved in the murders, after autopsies revealed Mr Miller was bludgeoned with a metal bar, and not the garden hoe used to kill Miss Witheridge.
This is what I found particularly interesting from the link ajc748 posted was that different weapons are thought to have killed David and Hannah. So the autopsies indicate Hannah was killed by the hoe and David was attacked with a metal bar (which has not been discovered) and also had water in his lungs. "While the blood on the hoe was from Miss Witheridge, it is believed Mr Miller was bludgeoned with a piece of metal, rendering him unconscious before he drowned at the water’s edge as the tide came in."
Police today also began searching for a second weapon involved in the murders, after autopsies revealed Mr Miller was bludgeoned with a metal bar, and not the garden hoe used to kill Miss Witheridge.
This is what I found particularly interesting from the link ajc748 posted was that different weapons are thought to have killed David and Hannah. So the autopsies indicate Hannah was killed by the hoe and David was attacked with a metal bar (which has not been discovered) and also had water in his lungs. "While the blood on the hoe was from Miss Witheridge, it is believed Mr Miller was bludgeoned with a piece of metal, rendering him unconscious before he drowned at the water’s edge as the tide came in."