"My staff overreacted to this tweet, and for that I apologize"

Sullivan’s 19-year-old sister, Olivia, told the AP her sister was in school Monday when their father talked to school officials. The elder sister, who initially alerted the media about what happened, said she texted with her sister and the teen told her “things were fine.”

Emma Sullivan said Sunday that she thought the tweet “has turned into a good starting point to open up dialogue about this … free speech and the power of social media and the power that people my age could potentially have, that people will listen to us.”