I re-listened while at the beach today on my mp3 player. I have some new thoughts to share.

If Kalani was referring to the girl who died at the golf course I don't think he literally means her name is Hannah/Hanna, her refers to her as "my hannah". I'm pretty sure I've heard friends and family used the term "hanna" to refer to any girl that is important to them or of interest. So maybe the girl at the golf course was his wife/girlfriend/daughter or something else of significant importance.

Don't we also know that Kalani brought Michael and Burt back to the tower in a helicopter? Plenty of time to let Kalani know what had transpired at the golf course.

If that's true, then I can't help but feel that Kalani was indeed the rat. We now know Pippen was indeed another spy and perhaps Kalani understood that tatic. Is there any evidence to show that Kalani could have pulled off the killing? Perhaps Kalani realized that the mallers realizd Kalani is helping the tower out now instead of being the mole/spy, thus the reason for killing "hanna"

He also mentioned to Angel that he wanted him to have his Journal and where did he store this journal? In someone elses desk (Bills desk, a nice safe place to hide a confession) if I'm not mistaken. Perhaps he knew someday that he might perish and he would hope to explain his whole part.

I'm pretty confident that Kalani was the spy.

I think he got tangled up and ended up in the Arena and then was saved by happenstance.

I think when he got to the tower he played it cool to see what the Tower was all about.

I think on one of his night shifts on guard duty he managed to relay some messages back to the Mallers and they told him to spy on the Tower or they would kill his "hannah".

He did play his part as spy for a while but I think after Angel and Kalani bonded I think he had a change of heart.

His apology to Angel about the tire on the hummer could be referencing his deceased apology from the grave to let Angel know he either did it on purpose or didn't take the mission seriously enough, but either way felt bad about it for one reason or another.

His Hannah died, and he wanted to die as well, possibly also to save his comrades (maybe another part of his sincere apology).

Completely unrelated to Kalani, I half heartedly thought the second person Scratch claimed to have from the tower was "Skittles" ... it would certainly put a strange twist on it wouldn't it.