Regan described the amount of polonium needed to kill a man as `` terrifyingly small ... `` I 'm convinced it was a political murder , '' says Suha Arafat . The Palestinian Authority has been under pressure to crack down on the group since its attacks in Jerusalem and Tel Aviv last month. Last year , his widow , suspecting he was poisoned , had the body exhumed for tests . Polonium-210 , a radioactive isotope , had been detected on his clothing and toothbrush .
`` I 'm convinced it was a political murder , '' says Suha Arafat . The Palestinian Authority has been under pressure to crack down on the group since its attacks in Jerusalem and Tel Aviv last month. Last year , his widow , suspecting he was poisoned , had the body exhumed for tests . Polonium-210 , a radioactive isotope , had been detected on his clothing and toothbrush .