you were focused on what you had done because you had just killed somebody. i mapned. judge what they shd do if they re unable to agree on a verdict. legal analyst joe tamburino says if there is a mistrial, potter could be tried again. now, that new trial would not happen next month. there could be a whole host of motions and things that would happen from now until then. but she could be tried again. reporter: tamburino says the judge will only declare a mistrial if the jury says it cannot reach an agreement, even with more time. deliberations are coming up now on 24 total hours. jamie. yuccas: david, thank you. tonight, we continue our special series on the war on cancer 50 years. cbs dr. tara narula looks at the holy grail of cancer treatments a vaccine for breast cancer. it s like finding a needle in a haystack. it was a matter of.