Yes he does. He does, "Injustice"
https://www.amazon.com/Injustice-JonBenet-Murdered-Sadistic-Psychopath/dp/1475074824
He also investigated the "Amy case".
And Robert Whitson, the first detective on the scene, believes it was an intruder. He wrote a book, too. https://www.amazon.com/Injustice-JonBenet-Murdered-Sadistic-Psychopath/dp/1475074824/ref=sr_1_1?dchild=1&qid=1613920771&refinements=p_27%3ARobert+A.+Whitson+PH.D.&s=books&sr=1-1