Amicus Opportunity: I have learned that a criminal defendant will be filing a Ninth Circuit brief next week making the 4th Amendment argument re the unconstitutionality of long-term use of 2703(f) letters that I developed in this 2016 blog post. (Thread.) orinkerrblog.files.wordpress.com/2018/10/the-fo… 
The issue is an important one: What are the legal limits on the government's ability to tell e-mail providers to run off a copy of all the e-mails in a suspect's account and hold them until they get legal process? In this case, the provider held the e-mail for over 9 months.
I have no connection to the case, but I have been told of it, and I can pass on contact information to anyone interested in writing an amicus brief in the case.
