AUSTIN (KXAN) — Authorities arrested a 17-year-old girl this week and accused her of making online threats against a northeast Austin elementary school, according to the suspect’s arrest affidavit.
The FBI received a tip about an Instagram user, later identified as 17-year-old Giana Castillo, “making concerning statements online… regarding the planning of an active shooter event,” at Graham Elementary School. FBI agents tracked the IP address of the account to Castillo.
While analyzing the account, investigators found “the user had an active interest with previous active shooters and posted concerning statements,” according to court documents. The affidavit also stated she planned to kill her family members before going to the school’s campus.
The arrest document indicates Castillo attended Graham Elementary School from 2013-2017.
According to court documents, “AISD was notified of the threat to one of their elementary schools which …