What I have difficulty getting is Jay's motivation in all this. The bit about protecting his grandma just seems half-baked to me -- but I also don't get why he would do anything else in the story. He has no reason to kill Hae, obviously, and he also doesn't seem to have any particular reason to go after Adnan with false accusations. Despite the weak evidence (and as a juror I would definitely have to acquit him) I am struggling to see any other real suspects here other than Adnan. Could it perhaps have been something to do with drugs? Perhaps Adnan and Jay were in deep in the drug trade and Hae threatened to expose them?