Didn't multiple people say they had been shown Hae's body by Adnan?
No. There was a kid who said that Adnan had shown him the body but he recanted his story and it kind of sounds like he borrowed it from something Jay said. Otherwise, the only person who directly claimed to see Hae's body is Jay.
Also there seems to be a crapload of coincidence in the loaning of cellphones and cars on the day of the murder to believe Adnan wasn't at least aware of what Jay was doing.
There's really not. What there is is a lot of evidence - in fact, this is documented in the interview itself - that the investigators sat down with Jay and the cell records and allowed him to reconcile his story with the towers. The problem is, even with this, his account is still not consistent with them:http://viewfromll2.com/2014/11/23/serial-a-comparison-of-adnans-cell-phone-records-and-the-witness-statements-provided-by-adnan-jay-jenn-and-cathy/
That site, by the way, also has a good breakdown of how Jay's testimony in general is horribly unreliable for 4 reasons:
- While it's often problematic to say that you should believe someone because of their good character, there is kind of a reverse to that - you shouldn't believe someone with bad character - and that kind of does describe Jay.
- Regardless of character, if the witness has no motivation to lie then one ought to generally believe them, and if they have motivation then one ought to be skeptical. Jay had every reason to lie to the cops; his original story was full of holes and the cops provided him with a list of the calls and basically said "hey, tell us what happened now, and if you have to fudge the details a little bit, we're OK with that". He was given free counsel thanks to a phone call the prosecution made. He as much said he lied in the second interview because he was under the impression that the place he now said it happened had cameras in the parking lot (it did not).
- Even if he had reason to lie, though, that in and of itself isn't really enough, is it? Okay, but his story has been wildly inconsistent from one telling to the next. We're not talking about minor details either; in one interview he states that Adnan killed Hae in Petapsco State Park, in another it happened in the parking lot outside of the school library, in yet another (also the story used in the trial) it happened in the Best Buy parking lot. He's all over the place about all kinds of things.
- That's all well and good, but even a liar can say factual things, and one way we can tell that is if they're backed up by corroborating evidence. But Jay's testimony really isn't backed up by corroborating evidence. Some of his multiple explanations of the cell phone calls are backed up, as one would expect them to be given the circumstances of his being presented them, but much of the rest is not, and again not just in trivial ways. Additionally, although Jenn backs up some of what he says (in particular the notion that he was at her house during the time Hae would have been murdered), *that* testimony isn't corroborated by the cell tower data.
As for motive, I think that motive is heavily overrated. I realize that the classic killer-catching formula is motive, means, and opportunity, but a. even that doesn't actually lead you to a causal relationship ("X killed Y"), it just presents an interesting correlation that needs to be discussed further. I can think of any number of reasons a guy like Jay might have killed Hae. Maybe Adnan hired him (which I find specious as well, but it's at least more likely than Adnan killing her with his own bare hands). Maybe he did it just for the experience, Clockwork Orange
style (this is, remember, a guy who tried to stab a friend of his because the friend had never been stabbed before). Maybe he was suspicious of Adnan's close relationship with Stephanie, Jay's then-girlfriend, and on the spur of the moment did something to get back at him. Maybe he cajoled Hae into giving him a ride and then tried to make out with her, and then she fought back and he accidentally killed her. I'm not saying any one of these reasons *is* it, but all of them are possible and part of why I'm not willing to say "nah, there's no motive, end of story".
Or maybe a 3rd party did it and Jay, being slightly more savvy WRT the justice system than Adnan and a guy known for, um, telling stories, told the cops what they wanted to hear because he saw the writing on the wall.