A stain contained higher levels of polonium-210 than a typical sample , a scientist says . Score: 6 `` There is sufficient evidence '' Yasser Arafat was killed , PLO official says . Use of polonium-210 as a poison `` does seem a bit of a stretch , '' toxicologist says .
A stain 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 Arafat was killed , PLO official says . Use of polonium-210 as a poison `` does seem a bit of a stretch , '' toxicologist says .