conceding under defense questioning that the print could have been planted. i had my reservations about it. it made me second guess it. if it s forged, does the case fall apart? that would be the one that the defense was knocked out of the park. and here is this very well-credentialed expert telling you, i don t know. i ve got reservations about it. that would have been strong evidence that he was not in florida. reporter: after seven weeks of trial, serrano s very life hung in the balance. the jurors, still unsure themselves at the end of testimony what side they d come down on. a show of hands question. when the defense sat down in their closing argument to you, how many of you were right on the line and didn t know where you were going to vote? show of hands. this was innocent until proven guilty still until that moment? yes. when we return, the tension in the courtroom as the jury hands in its verdict. all rise, please. when unfinished business when unfinis
pretty interesting. we know the defense sat blagojevich down over the weekend to restrategize and rehash what happened particularly in that last hour of cross-examination on thursday. but they would have done that anyway. if you ve got a three-daybreak that s what you do, you sit your client down. we have to assume that the prosecution did the same thing. and you also have to assume that s why things are little more calm and orderly, not as combative as they were on thursday. in absence of that chaos that blagojevich brought into the courthouse on thursday, it seems that the prosecution is really able to get things done today, jenna. jenna: interesting to see if that continues, mike. thank you so much, mike tobin today, in chicago. reporter: you got it. gregg: this is very important. doctors are calling this in fact a big breakthrough in cancer treatment. two cutting-edge drugs showing new promise. the science behind them and why this could lead to a whole new shift in how we treat c