from the url in the first post

Inside the suitcase: A pillow sham, a comforter and a Dr. Seuss book were found inside the suitcase. These items belonged to John Andrew, John Ramsey's older son. A CBI examiner issued a report indicating fibers from the pillow sham and comforter were found on JonBenet's shirt, on her vaginal area, on the duct tape from her hand, on the hand ligature and inside the body bag. Smit wonders if the intruder, intending to kidnap JonBenet, tried to put her inside the suitcase so he wouldn't be seen carrying a small girl through the area, but she wouldn't fit or he couldn't boost himself and the suitcase out of the window.

FBI analysis: FBI examiners said the fibers on JonBenet came from a source other than the pillow sham and comforter -- but none of them matched anything else in the house. "If the FBI examiner is right, the killer had to take that piece of material out with him," Smit said.