The Girl Scouts' mother initially took to Facebook stating that Kimberly was in the art class during the shooting, and she was unable to find her.
In a release Saturday, Galveston County District Attorney Jack Roady confirmed that Kimberly was among the 10 killed in the mass shooting.
Kimberly's mother wrote on Facebook, "She's in Heaven. I am heartbroken." She also updated her bio with the hashtags #fightforkim, #kimberlyjessica and #oneof10.