In fact Henry Lee, the noted coroner, said in his book that he could never fully discount that JBR's death may have been accidental and covered up by one or both of the parents.
And I think that's key. It isn't about implicating someone it's just that the Ramseys are hard to exclude. I think we would be jumping the gun to conclude, without caring about contrary evidence, that the Ramseys could NOT have been involved.
As I've said before, the evidence points everywhere and nowhere.
The tape is a good example. The animal hairs could have been transferred via tape......deliberately or not.
Duh...Mr. Lee!! It's their house and their child and you couldn't find the real guy with all your high-paid rhetoric.