A bank robber's cellphone gave him away. Now the Supreme Court is hearing his case (apnews.com)
Geofence warrants. 4th Amendment
Police don't have a suspect, and instead just fence a location. Allowing it could "unleash a much broader wave of similar reverse searches."
'The Trump administration's position would allow police to use geofence warrants and similar tools "with no judicial supervision or constitutional safeguards," according to the Policing Project at the New York University School of Law.'