An FBI forensics lab identified a blood stain outline of a child in the fetal position in the trunk liner of accused child killer Casey Anthony’s car, according to newly released documents.

The information came in an e-mail from FBI Intelligence Analyst Karen B. Cowan to another agency employee written on Tuesday, Sept. 30, 2008.

Anthony, 23, of Orlando, is charged with murdering her 2-year-old daughter Caylee, hiding the child's remains and lying to investigators about a baby sitter kidnapping her.

“If you look closely at this photo, there appears to be the outline or silhouette of a child in the fetal position," Cowan wrote.

The e-mail was included among thousands more pages of information pertaining to the Anthony case that were released by the Florida state attorney's office on Tuesday.

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"You can make out what may be the back, bottom, and legs most clearly," Cowan said in the message. "The image is best viewed on a computer screen, rather than a printout, but several of us can see this image and agree there is good chance we are seeing something significant."

Included in the newly released documents was information that duct tape found on Caylee's mouth was contaminated by an FBI investigator.

The contamination was discovered after FBI lab workers detected DNA from a girl or woman on the tape that didn't match that of Caylee, Anthony or her mother Cindy Anthony. After tests were conducted, the DNA was found to match that of a federal forensics documents examiner.

The lab that identified the blood stain also confirmed Caylee's identity when her remains were unearthed in December 2008, six months after she disappeared. Her mother didn't report her missing for a month.

Anthony has pleaded not guilty to first-degree murder charges and remains behind bars in Orlando. Her trial was pushed back from October 2009 to January 2010, but could be delayed even further.

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The Associated Press contributed to this report.