Today's criminal law/procedure cert grant

Issue summary is from ScotusBlog, which also links to papers:

• Diaz v. United States: Whether in a prosecution for drug trafficking — where an element of the offense is that the defendant knew she was carrying illegal drugs — Federal Rule of Evidence 704(b) permits a governmental expert witness to testify that most couriers know they are carrying drugs and that drug-trafficking organizations do not entrust large quantities of drugs to unknowing transporters.