Detective Fred Patterson interviewed Burke that morning (December 26th) and he stated that Burke had no idea that his sister was dead, Burke only thought his sister was missing, because this is what he was told. The detective said he was straightforward with him, didn't hold anything back and appeared to be completely honest. Burke would have to be some very super intelligent, crazy smart, insane/manipulative maniac to lie/pretend that well to a grown adult who was a detective.
In another documentary the leading British government forensic pathologist Stuart Hamilton looked at the marks on JonBenét and was asked about the train track theory and he called it "highly unlikely" "if you look at the injury to the face it's a lot bigger then the train track marks" and that it "borders on the fanciful" to believe such hogwash. The marks on her body and face cannot be explained by the train tracks, the train track would have left small very light marks these were bigger and bolder injuries, that left an electric arc that a train track cannot do!