Rodolfo A. Melgar recorded multiple victims with his cellphone, including a minor child.
The department is asking people who were just feet away when it happened to come forward.
Tickets go on sale Wednesday, October 18.
Libby Jones replaces interim director Sue Friedman.
Trevynn Lee Awkard, 23, of Greenwood did not survive.
Jaden L. Wade had last been seen leaving his home on Wednesday, October 11.
With PACEM opening on Saturday, park hours will return to normal on the same day.
Alison Parker and Adam Ward were tragically murdered during a live television interview in 2015.
Police were on a foot chase when one of two students suspected in an auto theft made it inside the school.
Capt. Mark Black to replace Colonel David L. Coggins, who is retiring.
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