I suppose I have just trusted what I've read. I also read The Death of Innocence which is the Ramseys book and when I was done with that, I thought they were innocent too. I am easily swayed.
I did find that reading and writing about this did my head in! I can see why so many police/detectives etc had to get off this case. Theres evidence that points to the Ramseys being guilty, there's some evidence that it was an intruder, its the craziest case that might ever have existed.