According to Aljazeera, to the question of whether Arafat was murdered, David Barclay says - YES!
David Barclay is a veteran forensic investigator, specializing in the assessment of physical evidence in murder cases. He is also Professor Emeritus at Robert Gordon University, Aberdeen.
Much has been written about Arafat's death, but the recent exhumation of his body for an authopsy by a Swiss forensic laboratory has left many questions eventually answered. Aljazeera investigated and David Barclay, based on the Swiss scientists report makes very clear statements that could proove the Palestinians leader's assassination. The huge concentrations of Polonium 210 found in Arafat's body, a particular type of this substance, had to be manufacted in a nuclear facility, according to the investigator. Considering the political situation of the region there aren't all that many places where it could have been produced!...For full info,
here follows the link to the full article.