Celina, was last seen Monday evening, July 25, at a computer in the home where she lives with her mother, stepfather and 13-year-old sister.
As the town awaits more information about Celina's death, her body has been turned over to the family, the Associated Press reported.
The memorial service for Celina Cass will be in West Stewartstown, according to a Facebook post from consignment shop Lads and Ladybugs, where Celina's mother, Louisa Noyes, works. The store will be closed until Monday, August 8.
Despite the town's heartbreak over Celina's death, West Stewartstown will hold its annual children's festival, called Stewartstown Days, in honor of Celina.
"We're hoping this is going to be the first step in our healing process," a festival committee member told ABCNews.com.