Austin Principal Charles Fowler wrote an article, "Open Questions In Unsettled Geofence Warrant Landscape," published by Law360. The article discusses geofence warrants, a controversial new investigative tool that lets agents identify some of the cellphones in a given area at a given time. Geofence warrants have taken off
in recent years, and this past summer produced the first two federal appellate decisions on the Fourth
Amendment implications of geofence warrants. Charles' article reviews the background and logistics of geofence warrants, the Fourth and Fifth Circuits' radically divergent approaches, and upcoming uncertainties.
The full article can be found here.