IMO he may or may hot have been guilty. At first glance, Occam's razor would suggest that a dead body doesn't just turn up your yard on it's own. No smoke without fare bla bla, but that's such a narrow minded approach considering the failings of the police.
My main problem with it was that the way the police conducted the whole investigation was a farce. A complete embarrassment with so many holes and so much corrupt crap going on that it meant the jury were just voting based on which way their heart strings had been pulled rather than the evidence. It brings to home the lack of rigour that the police have to put in to build a murder case, especially when the prosecution's can distort the evidence in any way they like and say whatever they want to the public in order to swing perception.
One more upsetting thing for me was that I grew to dislike the brother of the girl who was killed. He wasn't thinking straight and just wanted to see heads roll. Why didn't the family get outraged at all the missing pieces of evidence?
How on earth could they place the murder in the garage, then have no evidence for it?
The judge must have had some sort of agenda based on that alone. All in all, great show but it'll make you sad for humanity at the same time.