ive been pondering this too.Why did PF plan for Kelsey's phone to ping in Idaho to create an alibi for himself, but didn't think about the ping locations when making fake text exchanges in the days before? Did he not understand how pings work? Would there be enough evidence against him without this mistake?
i don't think he did know.
I think someone who came along after the fact cleaned up a few nasty messes and tidied ALL THE LOOSE ENDS. including hatching the ridiculous plan of taking the gun and phone to Idaho with her. even then she didn't really comprehend how it worked.
but still I personally think she concocted most of the 'getaway clean plan'.
moo