Where I'm coming from is someone who has followed true crime cases for over 30 years and observed many, many criminal trials.
I'm saying that the defense definitely can obliterate the forensics - if they come up with the right strategy - it has been done in many, many trials by many, many defense teams. Will they accomplish it in this case? I don't know. Some defense teams have managed to accomplish this, others have failed. Some have done it on a scientic basis, others have done it using logic. Who can ever forget the closing arguements of the OJ case when Johnnie Cochran said "If the glove don't fit, you must aquit." With that one moment (and OJ having tried on the glove and it didn't fit), Cochran destroyed the prosecution. It didn't matter to that jury what LE, the forensic labs or the FBI put together for that case. The prosecution and every bit of their very credible forensic evidence was completely and totally obliterated in that jury's mind. Might a moment like that occur in Casey Anthony's case? It is very possible.
Anyway, the way that the defense handles the forensics will make the trial very, very interesting. The thing about forensic evidence is that it is surprisingly open to interpretation. Two forensic scientists looking at the same piece of evidence may reach two completely different conclusions. If the defense can show enough disparity between the interpretation of the data by the FBI/LE vs. their expert witnesses, or the jury finds the defense witnesses more credible or even more likeable, the defense will bring about reasonable doubt. But, as we have seen with the OJ trial forensics can be demolished by other means than science by a talented defense team. And between Linda Baden and Andrea Lyon, Casey now has a very formidable defense team.
To me, Casey's guilt or innocence doesn't really enter into a discussion of the defense's case. Defense attorneys could care less if their clients are guilty or innocent. The goal is to demolish the prosecutions case in any way that they can.
If you want to know my personal opinion, having read all the documents released by defense and listened to all the interviews and seen all the videos of Casey with her family, in my opinion, it looks like Casey is guilty. But as an American citizen,
legally, I have to say that Casey is
innocent until proven guilty in a court of law. Therefore, I cannot go around saying that Casey is guilty until she has been tried and convicted no matter what the prosecution evidence shows. And juries have surprised me before and voted not guilty for defendants that I had thought it would be impossible NOT to convict having sat through the whole trial. One very striking case is that of Candace Montgomery a pretty amazing case where the defendant was not only provably guilty with direct evidence against her, but admittedly so and she also admitted to taking action to cover up her part in the murder, yet the defense demolished the prosecutor's case and the jury returned a stunning Not Guilty verdict - it's a great read:
http://www.trutv.com/library/crime/notorious_murders/classics/betty_gore/1_index.html