LSU granted Turner a release from his scholarship last Wednesday to any school outside of the SEC, but he was undecided whether to stick with new Tigers coach Johnny Jones or choose another school.
Turner visited Raleigh over the weekend and chose to join coach Mark Gottfried and the Wolfpack on Monday.
Turner was recruited by Gottfried and his staff at Alabama in 2009 out of Muscle Shoals (Ala.) High, but the three-time All-State performer chose LSU early in the process.
He averaged 12.3 points a game as a freshman, earning SEC All-Freshman team honors, but took a bit of a step back to 9.1 points per game as a sophomore.