The drug mule case that might get the Supreme Court to change a federal rule on expert testimony

Justices will be releasing their opinion on Diaz v. United States following last week's oral arguments

The Supreme Court heard oral arguments for Diaz v. United States on March 19.

Can an expert witness take the stand and say, based on their experience, that a particular defendant in a drug trafficking case probably knew she was smuggling drugs into the U.S.?

No.

Can an expert witness say, based on their experience, that people who attempt to drive into the…