Listened to all of it while convalescing yesterday.
Spoiler
Adnan did it and Jay was more involved then he let on hence the inconsistencies with the story and phone logs. Adnan could obviously be up for parole now if he came clean, but his persona is based on 'being a nice guy' without that mask he would have nothing left, so he prefers to keep up with the farce. Jay, even though he is slightly leftfield comes across as a genuinely nice guy, who somehow managed to get himself involved and immediately recoiled from the horror of what he got himself into. Adnan had to find an excuse to get into Hae's car, hence pretending that he needed a lift and giving the car to Jay, which implicated him. I think Adnan managed to get into Hae's car and they drove to where his allegedly broken down car was, Best buy or that other place, where Jay was waiting. That was where he strangled her and I think Jay might have helped remove her body and put into the trunk of Adnan's car. One of them drove Hae's car to the place it was dumped, while the other one followed behind. It could possibly have taken place at Woodland library, and then Adnan called Jay, which would implicate him less.
That trip to Cathy's place, to provide an alibi for BOTH of them was telling. She was a friend of Jen's and only a passing acquaintance of Jay, so it was odd for him to turn up at her place with Adnan to smoke some joints. He was also not the laid back Jay but asking questions etc, acting not his normal self. Again, I think he caught on later that night how odd that visit must have seemed so he returned with Jen and made out it was nothing. I think Jay and Adnan buried the body in Leekin Park, might have smoked a joint at Potomac viewing point to discuss what to do with the body. It doesn't matter too much, whether Adnan went to track training or not, nor does the Neesha call have the relevance it did if both of them were more in it then Jay has led on. It might have happened on that day or might have been a butt-call. Jay getting involved in the first place is a bit of a mystery, he comes across as being quite a decent guy once you get past the Rodmon craziness. Selling a bit a weed is not the same as being a hardened criminal.
Adnan had a motive, in all the prison phone transcripts, he rarely talks about Hae. Not speaking at both trials, I find that a bit odd if you are innocent, and even though the jury were explicitly told not to make anything of it, those interviewed did. Is Adnan a sociopath? hard to tell, and as sarah pointed out not every sociopath is a murderer, in fact many of us have managers at work who share the same traits. Even though their was a bit of planning in Hae's murder, I think it was a crime of passion, he was seething inside but could not show it, certainly not to his close circle of friends, who were also friends with Hae. The good personable persona which probably makes up a large part of who he is, is what they saw, but with Jay, I think he showed his other side, hence, all the threats and telling him what he was going to do to her. Adnan's comments to Jay in court "Pathetic!", I read that as Adnan admonishing Jay, who was always in on it, for pussying out, developing a conscience and coming clean.
I hope the DNA matches that other guy, and Adnan somehow is not guilty because he certainly comes across as a likeable guy, but that does not explain how Jay knew where the car was. In a way, you look at that picture of Adnan's mugshot, that is an expression of a young man who knows he's done something wrong and he's been busted, he looks so sad and mournful. Jay incidentally after doing an internet search, has the same mournful sad eyes, I find it hard to believe either of them could have been involved in such a heinous crime but I think they were.
In terms of law, Adnan, I agree with Sarah, he should not have been convicted, their was not enough evidence. It would have meant that the police would have had to lean more on Jay, which would have lead to 'bad evidence'.
Great show, looking forward to the next series.