Oral arguments in Sessions v. Dimaya. U.S. Supreme Court.
The case was actually argued twice: on January 17, 2017, and again on October 2, 2017. The first hearing took place with just eight justices, following the death of Antonin Scalia. The second took place after Neil Gorsuch joined the court.
Sources:
https://www.supremecourt.gov/oral_arguments/audio/2017/15-1498rearg
https://www.supremecourt.gov/oral_arguments/audio/2016/15-1498
