certificate as death unknown. he would have been put in the ground, and it would have been just a mystery. unknown unknown assailants. turn the page, move on. it s the key of this murder. polonium 210 was discovered and now we know exactly sasha was killed by polonium 210. reporter: it s an almost perfect murder weapon. polonium has no smell, little taste, and without specialized equipment, it s undetectable. reporter: the amount that killed litvinenko, slipped into something he ate or drank, was no larger than a grain of salt. but that s still a thousand times the lethal dose. and that tiny bit of polonium would have been enormously expensive. $8 million to $12 million to be able to get the portion that went into him. reporter: but who could get hold of such an expensive and exotic weapon? and just how did they deliver the fatal dose? when detectives went step by
12 hours earlier, would it have made any difference? because they wouldn t have found out. they would have marked the death certificate as death unknown. he would have been put in the ground, and it would have been just a mystery. unknown unknown assailants. turn the page, move on. it s the key of this murder. polonium 210 was discovered and now we know exactly sasha was killed by polonium 210. reporter: it s an almost perfect murder weapon. polonium has no smell, little taste, and without specialized equipment, it s undetectable. reporter: the amount that killed litvinenko, slipped into something he ate or drank, was no larger than a grain of salt. but that s still a thousand times the lethal dose. and that tiny bit of polonium would have been enormously expensive. $8 million to $12 million to be able to get the portion that went into him. reporter: but who could get hold of such an expensive and exotic weapon?
reporter: why, if he had died 12 hours earlier, would it have made any difference? because they wouldn t have found out. they would have marked the death certificate as death unknown. he would have been put in the ground, and it would have been just a mystery. unknown unknown assailants. turn the page, move on. it s the key of this murder. polonium 210 was discovered and now we know exactly sasha was killed by polonium 210. reporter: it s an almost perfect murder weapon. polonium has no smell, little taste, and without specialized equipment, it s undetectable. if you not looking particularly for polonium, you not able to discover it. do you know, it will be everywhere, but you don t know this. reporter: the amount that killed litvinenko, slipped into something he ate or drank, was no larger than a grain of salt. but that s still a thousand times the lethal dose. and that tiny bit of polonium would have been enormously expensive. $8 million to $12 million to
reporter: why if he had died 12 hours earlier, would it have made any difference? because they wouldn t have found out, they would have marked the death certificate as death unknown. he would have been put in the ground and it would have been just a mystery unknown unknown assailants. turn the page, move on. it s the key of this murder. polonium 210 was discovered and now we know exactly, sasha was killed by polonium 210. it s an almost perfect murder weapon. polonium has no smell, little taste, and without specialized equipment. it s undetectable. if you re not looking particularly for polonium, then you would not able to discover it. do you know? it will be everywhere, but you don t know this. reporter: the amount that killed litvinenko was slipped into something he ate or drank and was no larger than a grain of salt, but that s still a thousand times the lethal dose. and that tiny bit of polonium
search. and search lights that the lookouts can use at night. search crews have not been able to recover anymore bodice from the sea today, as andrew reported. they have pulled 30 bodies from the water and identified 6 of them. paula hancocks joins us from indonesia. we keep hearing about the sophisticated equipment, paula, that people there have where you are. but weather continues to complicate things. what did you see? reporter: first of all, there s much happening behind me. this is a russian plane that handed about an hour ago. onboard, they have 22 deep sea divers. they have sonar and more specialized equipment has arrived in the region. we just spoke to the deputy ambassador. and he said it s the most