Why do you think he was necessarily implied in the murder? I don't believe it's impossible that the mother did it all alone. I think it is very possible it happened like I read, John and Burke went to bed, Patsy stayed up, JonBenet wet her bed and goes to see her mom, she cleans her and goes in the bathroom to shower her a little, they had to wake up early and she didn't want her to smell pee in the car, JonBenet is not quiet Patsy pushes her violently. The child no longer moves, her husband has an horrible temper and she's scared of his reaction; which is rather understandable: "Honey I just killed our daughter" is not easy to say I guess so she starts staging the whole, maybe that's why JonBenet was wiped so violently she had to bet wet for Patsy to move the body. Then she writes the letter and is mad at her husband because she feels so unable to face him not only for that but generally and tells him many things she'd never have told him in front. Maybe in a first time she thought she'd dump the body and that's why she told her husband to be rested, for her to get the time to dump it while he slept. It's very probable she did it all alone and was such an actress all in appearances that her husband and son believed her. She reminds me a bit of that woman who put her babies in a fridge in Asia, her poor husband just believed her until a second DNA test showed they were the parents. And she had a bit the same look as her, lost in emptiness, looking fakely tragic.