It requires a warrant as long as FLIR is "a device that is not in general public use"[1] That is changing. [1] http://caselaw.findlaw.com/us-supreme-court/533

It requires a warrant as long as FLIR is "a device that is not in general public use"[1] That is changing. [1] http://caselaw.findlaw.com/us-supreme-court/533/27.html http://caselaw.findlaw.com/us-supreme-court/533/27.html