The brother did it.
I have believed that for a long time. It's the only thing that fits.
For instance, a 911 conversation later suggested they heard John saying, ‘We’re not speaking to you.’ The tone apparently was for a kid (speculatively for Burke). Further call record showed Patsy exclaiming, “What did you do? Help me, Jesus!”Investigators Concluded Burke Killed His Sister Because She Took His Snacks
Also, the FBI team claimed when JonBenet tried to take some of the fruit snacks (pineapple) from her brother, then 9-year-old Burke lost it and forcefully struck his sister with a torch. Several media afterward theorized that in the ensuing panic, Ramsey strangled his own sister to death.
Apparently, the autopsy also revealed that there were pieces of undigested pineapple in JonBenet’s system.
The research team subsequently suspected Burke Ramsey accidentally killed his sister. Then after finding out, his parents Patsy and John tried to cover up the murder in order to protect their son.
Burke Ramsey Sued Those Who Accused Him Of The Killing His Sister
Investigators reported the deceased’s brother was jealous of her beauty queen title and had even smeared poo on her Christmas presents. They argued Burke had always been quick to anger even before his sister’s death. As such, during a game of golf with his sister, the older brother lost his temper and hit her in the head with a golf club, leaving a scar on her head.