I spent a good many hours reading the court transcripts, like the actual proceedings.
I'm not saying Amanda, boyfriend and Guede aren't pathological liars. They're all liars and I don't believe any of their testimonies.
There is however expert witness testimonies, other witnesses, sequence of events, presented evidence etc. It's apparent there is a hidden motive behind the defence case. It's clear there have been planted evidence, corrupted evidence, inconsistent expert testimonies etc. this happens in most cases when the victim's family aren't satisfied with the outcome. For instance, Meredith's mother is black, she like you perhaps believes that white chic did it and not the poor back dude. This reason alone can motivate a defence team to milk the situation to the max - be it planting evidence, bribery etc.
The fact DNA just happened to turn up in key places, 45 days after examining the crime scene is inadmissible. The defence case is inconsistent, they tried too hard and exhausted too many avenues to make something out of nothing. Now Guede (the one who committed the murder) will be out in a few years when they should've focused on building a case against him. Like bringing in more experts to testify on his psychological condition and to have him locked up for good. My guess is, the defence knows he did it but didn't want him sent to a mere mental asylum for his psychopathic state. Guede needs help. That's a young man out of rage murdered a defenseless chic.
let me continue this a bit later, I'm in my office and I need to head out to my executive lunch with staff on this gorgeous sunny day.