In this post, I make several random observations about the Carpenter cell phone ping-records case. There is no particular order to my musings.
First Random Observation: Despite the fact that he and I almost got into a naked mud wrestling match over another Fourth Amendment issue, I agree with Professor Orin Kerr’s point of view in the Carpenter case. Among other things, he argues in his amicus brief (at page 3) that:
Obtaining historical cell-site records from a cell phone provider is like obtaining testimony from an eyewitness to suspicious conduct. By contracting with a cell phone network provider to deliver their calls, customers ensure that network providers may be available to testify – whether in person or by sending records – about how the providers made that delivery for their users. Just as a person voluntarily exposes himself to observation by traveling in public to deliver a communication, so does a person voluntarily expose himself to observation by hiring an agent to deliver his communications remotely. The Fourth Amendment is not implicated by compelling testimony from an eyewitness or by observation in public.



