Magistrate Judge Rejects Mosaic Theory of Fourth Amendment For Cell-Site Information

I have posted the short opinion (dated March 23) from Magistrate Judge Collings of the District of Massachusetts here. It largely adopts the reasoning of United States v. Graham from the District of Maryland, which I blogged about here. In my view, Judge Collings was correct to issue the order without probable cause for a second reason: The Fourth Amendment questions are not yet ripe for review, as I argue in this amicus brief I filed recently in the Fifth Circuit.

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