The 18-year-old Georgia high school student charged in a teacher’s death is expressing his "deepest sorrow" after an annual prank turned tragic.

The five teenagers whose teacher died during a fatal practical joke will not be prosecuted over the death, a district attorney in the US state of Georgia has said.

After Hughes died, Laura — who is also a teacher — told The New York Times that her husband “was excited” for the annual prank and “was waiting to catch them in the act." She also told the outlet that...