A sample contained higher levels of polonium-210 than a typical sample , a scientist says . Someone trying to get away with murder would be better off using pharmaceutical agents , since a number of of them `` disappear in the body '' and can not be identified later , he said . The test results do not necessarily mean Arafat was poisoned , the scientist says . ` ` There is sufficient evidence '' Yasser himself was killed , PLO official says . Use of polonium-210 as a medical ` ` does seem a bit of a stretch , '' He says .
A sample contained higher levels of polonium-210 than a typical sample , a scientist says . The test results do not necessarily mean Arafat was poisoned , the scientist says . ` ` There is sufficient evidence '' Yasser himself was killed , PLO official says . Use of polonium-210 as a medical ` ` does seem a bit of a stretch , '' He says .