Newly released surveillance video shows Hill walking into the school after being let in the front door by a woman with a child.

Police said Hill confronted office staff around 1 p.m. and told bookkeeper Antoinette Tuff to call the local media. She told a WSB-TV that the gunman wanted the news to "start filming as police die."

Police said Hill opened fire at the school and was armed with hundreds of rounds of ammunition, but he was eventually apprehended peacefully.

No students, faculty or law enforcement officers were injured in the ordeal.

Hill was sentenced to 40 years in prison, with 20 to serve.

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A native of Columbus and a fine arts graduate of Clark Atlanta, Amy Sherald was chosen as the official portrait artist of former first lady Michelle Obama. On the same week that the portrait was unveiled at the Smithsonian National Portrait Gallery, it was also announced that Sherald was awarded the High Museum's 2018 David C. Driskell Prize. (Andrew Harnik/AP)

Credit: Andrew Harnik