In the first day of defense testimony in the Casey Anthony trial, two forensics experts were called to the stand to talk about evidence collected at the crime scene. One expert claims that the tape found on Caylee’s skull was contaminated by a lab technician. Greta Van Susteren joined Shep to comment on the latest in the case saying, “The defense is taking everything and throwing it against the wall.”

Greta also weighed in on whether she believes the defense will call Casey Anthony to the stand. While Greta says that the team probably has a good idea already if she’ll testify or not, the defendant is usually the last to testify. If she were involved, Greta would keep Casey off the stand saying, “I suspect that she’s the world’s worst witness.”

Tune in to On the Record, tonight at 10p/1a ET.