I'm sorry to keep posting. I keep having more thoughts as I read new posts.
Being a tech worker, and someone who lives in an area that is so tech-reliant, I would find it next to impossible to believe that Cheryl didn't have a google account. Anyone with a google account can see where they've been with their phone. Try it yourself at https://www.google.com/maps/timeline
So LE can easily login and check out where and when that phone was physically.
Unless she had gps tracking (google location tracking) turned off, as I do.