Well this is more of an argument towards the "Hannah got shot" theory, but:

Kalani wasn't at the golf course. He didn't know what happened there. Him, Datu and Pegs were messing around with the helicopter while Saul, Burt, Michael, Riley, and Victor went to the golf course for the trade-off.

That's the problem I have with all these theories. Kalani wouldn't have been like, "What happened at the golf course? A redhead got shot? Oh god that was my Hannah time to kill myself." Because there is no way he could have known, he wasn't there.