Months later, in October, the Queen was the subject of another attack while on a visit to Dunedin, New Zealand. New Zealand Security Intelligence Service documents, declassified in 2018, revealed that 17-year-old Christopher John Lewis fired a shot with a .22 rifle from the fifth floor of a building overlooking the parade, but missed. Lewis was arrested, but never charged with attempted murder or treason, and sentenced to three years in jail for unlawful possession and discharge of a firearm. Two years into his sentence, he attempted to escape a psychiatric hospital in order to assassinate Charles, who was visiting the country with Diana and their son Prince William.