No need.
https://www.thelancet.com/journals/lancet/article/PIIS0140-6736(16)00144-6/fulltext
Po poisoning. Results of confirmatory analysis that became available after the patient’s death established the presence of 210Po at concentrations about 109-times higher than normal background levels. Post-mortem tissue analyses showed autolysis and retention of 210Po at lethal doses in several organs. On the basis of the measured amounts and tissue distribution of 210Po, it was estimated that the patient had ingested several 1000 million becquerels (a few GBq), probably as a soluble salt (eg, chloride), which delivered very high and fatal radiation doses over a period of a few days.
It’s in the same group as oxygen, sulfur, selenium, and tellurium. Probably not even close to being enough to impart that trademark stench, though
