Now that SCOTUS has ruled that "geofence warrants" are 4th Amendment searches, Congress and state legislatures need to enact legislation to guide how and when such warrants should be issued. Here's a guide my Clinic wrote tackling just that question. tlpc.colorado.edu/tlpc-publish...
tlpc.colorado.edu
TLPC Publishes Model State Policy to Regulate Geofence Warrants – Samuelson-Glushko Technology Law & Policy Clinic (TLPC)