MOO they don't know where he was once it went on airplane mode.
But that is unclear.
I don't see what's unclear about it. The phone goes into airplane mode at the residence @ 4:30am. He tells LE that he last saw SM sleeping at 5am. This puts him at the house. The phone comes back on a 5:37am as he is driving to Broomfield.
This is why it's important to have more truck data. Did the doors to the truck open and close again at the home both @ 4:30 when he arrives back home and after 5:00am when he says he last saw Suzanne and leaves the residence. I'm going off what's on the timelines.