Help me here.
In lieu of an actual alibi, since he doesn't have one, the Defense is going to show where BK's phone was at the time of the murders?
Clever if he left it on a tripod, set to take photos (of cloud cover) at random intervals or hired someone to manipulate his phone in one town while, phoneless, he manipulated a knife in another. Doubtful he was that clever.
IMHO this is no alibi. It's even less than that. It reveals a countermeasure the defendant took to create (an appearance of) an alibi, by leaving his phone behind. Stashing it.
Actual facts will probably show that, wherever his phone did or didn't go, it was OFF.
So SODDI. Some other dude did it. Sweater ninja.
So SOCDI. Some other car did it. Sedan ninja.
So SOPDI. Some other phone did it. Cellphone ninja.
Star gazing? Really? On a foggy night....
More likely staring into a fishbowl, constellation good vibes.. as he talks to himself, car parked, and prepares to go in...
His alibi is dead in the water.
JMO