A log of my whereabouts and activies I consider my personal document, exactly the same as I consider a paper version stored in a briefcase. I took the false exa

A log of my whereabouts and activies I consider my personal document, exactly the same as I consider a paper version stored in a briefcase. I took the false example from the article and adapted it rather than just using the headline. "Imagine a homicide in an alley caught on a nearby surveillance camera. The video is clear enough to see the attack, but too grainy to identify who did it. It is obvious from the video, however, that the perpetrator is checking his cell phone as he walks out of the alley. Having determined the location and time of the killing from the video, would it be lawful for the police to obtain a warrant leveraging the tracking capability of mobile devices to identify whose cell phone was in the area of the crime when it occurred?" In this case I swapped a digital briefcase for a physical one. If I hire someone to carry my briefcase it does not negate my right to the protection of it or its contents.