There are dozens of items of evidence and circumstances that point to Burke as being directly involved in the death of JonBenet. To begin with, for the sake of brevity, I'll single out just three of these items:
1. There was no credible evidence of an intruder. And Burke was one of three known individuals -- John, Patsy, and Burke -- in the house that night. John and Patsy have exculpatory evidence in their favor, including DNA analyses, handwriting analyses, and polygraph examination analyses. Burke has no known exculpatory evidence in his favor.
2. JonBenet ate pineapple at the Ramsey's breakfast room table approximately one hour before she died. The bowl of pineapple from which she snacked from was left out all night on the table. It had two sets of fingerprints on it -- Patsy's and Burke's. Patsy's prints were on it because it was she who had to have removed the bowl from the dishwasher and put it away in an overhead kitchen cabinet at an earlier time. Burke's prints were on it because it was he who had to have removed the bowl from the cabinet, spooned out fresh pineapple from a container in the refrigerator, and put the bowl on the breakfast room table. Burke and JonBenet had obviously snuck downstairs together in the middle of the night. JonBenet had pineapple (one of her favorite snacks), and Burke had a glass of tea (he was the resident tea drinker). The glass with a spent tea bag in it was left on the table next to the bowl of pineapple. The bowl of pineapple and the waterglass were at the respective seats at the table where JonBenet and Burke usually sat.
3. All three Ramseys -- John, Patsy, and Burke -- lied about the whereabouts of Burke at 5:52 A.M. when Patsy made the 911 call. In separate police interviews they all had the same story, that Burke was in bed and had never been up, and therefore he knows nothing. The enhanced 911 tape had Burke's voice on it, proving that Burke was up at 5:52 A.M. and was engaged in conversation with his parents. The lies showed a conspiratorial effort to protect Burke by trying to distance him from the murder. The lies also destroyed the Ramseys credibility with regard to whatever else they said took place that morning.
JMO