Agree, and it had occurred to me when I read her story that here was a bit of reality to hang a later lie on.
I wasn't saying his story happened at all. I'm saying he gave the detectives a timeframe of 2 1/2 hours which included driving the highway there and back + 15 minute repair job, and the detectives who know the drive were OK with that time frame. The spot where his truck didn't really break down is farther down the road than the crime scene, so say two hours for the drive to and from the turn off to Nua'ailua, give or take a few.
If he had 3 1/2 hours and returned at midnight, then that gives him 1 1/2 hours, but then 1/2 hour or so to go to Nahiku and back, so only one hour for the murder and everything else (by my rough calculations).
I think he went to Nahiku first and dropped off Nala, and her phone's last ping off a tower is at 10:58. Otherwise he does not have any time to go to Nahiku and still make the rendezvous at Hanzawa's, not with an hour's drive back from Paraquat's. Even then, it is tight, as he must have switched vehicles and stopped at his home for grandfather to see.