This is exactly why they should have brought the college friend in, it's all too coincidental considering how Peterson's wife was found.
Hey, IMO, they need to worry about getting the conviction now--appeal be damned!
Absolutely, Brocchini may have set in motion a basis for an appeal with his testimony should there be a conviction but like you said winning it is a whole other matter. It does happen though occasionally which is why I don't anticipate Geragos going with a mistrial. His chances of success would be stronger on appeal than retrying the case all over again.
Ah, but there's the rub! If Geragos doesn't object and move for a mistrial, then he has lost his chance to appeal based on that issue!
A lot of good issues get lost, and are not allowed to be raised on appeal, because the lawyer didn't object or move for mistrial during the trial, and therefore the appeals court will consider any objection the lawyer might have raised as WAIVED.