Yes - that's my question. How do those pings work? How close do they pinpoint the location?
i question what is meant by "ping". iirc her mother told a neighbor her phone had pinged at that location and this was told to the neighbor the same afternoon she went missing. there's no way to pull actual phone provider ping data that fast and certainly not without a warrant. it's possible an app she had on her phone had a public interface (jogging app with a login, "find my friends" app on iphone) but the legitimacy of that location data depends on the application itself.