The Perfect Murder
Because each different poison disrupts the body in a slightly different way, they have very different effects. Some seem harmless in the beginning. The victims may walk about for weeks without knowing that that they have been poisoned. That was the case with former KGB agent Alexander Livinenko, who died of polonium poisoning in November 2006 after unknowingly drinking 10 microgrammes of the poison in a cup of tea. The Russian experienced severe stomach cramps in the days after he was first poisoned, but he had no idea that they had been caused by polonium moving through the blood-stream to his organs. First, he lost his hair as the poison disrupted his follicles.