'Junk science' at center of Casey Anthony hearing

By Amanda Evans and Jacqueline Fell, Reporter
Last Updated: Wednesday, March 23, 2011

Attorneys are waging a crucial battle over evidence this week in the Case against Casey Anthony.

Not only are the judge's decisions important to the case, but they could set a precedent for future cases.

Two police dogs trained to detect decomposing bodies searched the backyard of the Anthonys house and Casey's car.

Detectives said the dogs alerted, but the defense asked how they could tell.

Jose Baez: And how do you know the dog alerted?
Sgt. Kristen Brewer: Best to my recollection, the dog sat (inaudible)
Baez: And at that time, did Deputy F. advise you that the dog had given a full trained alert?
Brewer: He advised the dog had alerted in that area at the time. That was the dog's alert.

The defense also said handlers can tip off dogs, which is just one issue centering around a series of hearings testing the science and evidence against Casey.

The judge will decide if it's too new or acceptable evidence.

At times emotions ran high.

Both sides argued about that one strand of hair found in the trunk of Casey's Pontiac.

The FBI said there was a tiny microscopic ring found at the root of that hair, which shows decomposition.

The defense said that doesn't mean a dying or dead baby was ever in the trunk.

"One, I have not testified to this and two, my conclusion would never be that it came from a deceased individual, only that it is consistent with either postmortem root banding or some other characteristic to some other decomposition and that it would be consistent with coming from someone who was deceased but my opinion would never be that it absolutely was, said Karen Corsberg Lowe, an FBI examiner from Quantico, Va.