Casey Anthony appears in court during her trial, Saturday, June 11, 2011, at the Orange County Courthouse, in Orlando, Fla. Anthony, 25, is charged with murder in the 2008 death of her daughter Caylee. (AP Photo/Joe Burbank, Pool)
ORLANDO, Fla. — A hair and fiber investigator for the FBI took the stand Monday as the murder trial of 25-year-old Casey Anthony enters its fourth week.
Stephen Shaw told jurors he analyzed hair found in Casey Anthony's trunk and samples taken from 2-year-old Caylee Anthony's skull, which was found in a wooded area near the Anthony home.
Shaw testified that he saw more evidence of decomposition on the hairs taken from the child's skull than on the hair found in the trunk.
Meanwhile, Judge Belvin Perry ruled that prosecutors could not use an electronic presentation of the hair analysis as evidence, saying that he found it troubling the contents of the study were not shared with defense attorneys ahead of time. Jurors waited outside the courtroom for about 20 minutes while the issue was settled.
Prosecutors contend Casey Anthony suffocated Caylee with duct tape. The defense has argued the toddler drowned in her grandparents' swimming pool on June 16, 2008.
The child was not reporting missing for 31 days. Her remains were found in a wooded area near the Anthony home in December 2008.
Anthony has pleaded not guilty and faces the death penalty if convicted.
Last week, the defense objected to hearing testimony from a University of Florida professor who planned to present a computer animation of the way duct tape could have been used in the child's death.
Perry ruled the jury could see the animation, which featured a picture of Caylee taken alongside her mother that was superimposed with an image of her decomposed skull, and another with a strip of duct tape that was recovered with her remains. The images were slowly brought together showing that the duct tape could have covered her nose and mouth.
As the prosecution case winds down, jurors have heard from witnesses ranging from Anthony's family members and friends to law enforcement to forensics experts.