JonBenét ate fresh pineapple about 1-2 hours before her death.
In February, 1998, detectives from the Boulder police department asked their assistance in conducting an analysis of the contents from the intestine obtained during the autopsy. At the initial examination, Coroner Meyer had suspected that the retrieved substance was pineapple fragments. The bowl of pineapple detectives found on the dining room table at the Ramsey residence the morning of December 26 had been taken into evidence that morning and frozen for future comparison studies. After examining the two samples, the biology professors confirmed that the intestinal substance were pineapple, and that both this specimen and the pineapple found in the bowl contained portions of the outer rind of the fruit.
The study also identified both samples as being fresh pineapple not canned. The conclusion of the two professors was that there were no distinctive differences between that found in the bowl and that removed from the intestines. - Bonita papers
Steve Thomas also mentioned these two CU professors in his book.
Dr. David Norris and Dr. Jane Bock were the two forensic botanists/Colorado University professors that evaluated the intestinal contents of JBR stomach. The pair are very well known in their field and have authored the book FORENSIC PLANT SCIENCE. This is a passage from their book:
“On Christmas Day, 1996, the body of 6-year-old JonBenet Ramsey was discovered in her family home in Boulder, CO, sparking an intense investigation that has yet to result in an arrest for her murder. Although her stomach contained no food, intestinal contents verified that she had eaten pineapple the night before as mentioned by her parents. Fresh pineapple contains unique crystals (raphides) not found in most commonly eaten foods, making it relatively easy to distinguish. We were also asked to compare wood fragments found in tissues examined at autopsy with a possible source found at the crime scene. Later, a Grand Jury did issue an indictment, but the Boulder District Attorney chose to disregard the indictment as he believed he could not get a conviction with the evidence available at that time.”