IMO this is a game changer. Presumably, BK will claim he was in an area with no service during the murders, which would account for his phone not reporting to the network.
Being out of range vs switched off has very different implications in terms of what the phone can record or not.
Specifically, even if out of range or in airplane mode, things like the gyroscope and accelerometer will still continue to record. However of the phone is switched off, those two cease to function until the phone is switched back on.
If an analysis of the phone data shows no gyroscope or accelerometer activity during the murders, then his alibi falls apart, since that would tell us he switched off the phone.
But if the gyro and accelerometer still show movement consistent with driving during those hours, then his alibi would be confirmed.
Being out of range vs switched off has very different implications in terms of what the phone can record or not.
Specifically, even if out of range or in airplane mode, things like the gyroscope and accelerometer will still continue to record. However of the phone is switched off, those two cease to function until the phone is switched back on.
If an analysis of the phone data shows no gyroscope or accelerometer activity during the murders, then his alibi falls apart, since that would tell us he switched off the phone.
But if the gyro and accelerometer still show movement consistent with driving during those hours, then his alibi would be confirmed.