MATTHEWS, N.C. -- After a deadly school shooting at Butler High School, students and parents are wondering how to move forward. 

• Mental health experts say students and teachers may be wondering how could they have prevented the incident.
• Schools officials say counseling is available for anyone who needs it.
• Butler High School will be closed again Wednesday.

School officials say the violence stemmed from bullying that had gotten out of control. 

Dr. Ryan Kelly, a psychologist at Southeastern Psych in Charlotte, says students and teachers may be left wondering if they should have stepped in earlier to prevent the violence. 

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"Hindsight's 20/20, we can always look back and say 'hey, that was a predictor that it was going to happen,' but 999 times out of 1,000 it was not going to predict something so terrible," Dr. Kelly said. 

Dr. Kelly says parents and faculty should focus on making sure students feel like they have a person they can go to if they need to talk about the violence, or any other problems they may be having. 

"Reassure them that they have a safe place, provide that for them," he says. "Provide a safe place where they can define their experience, define how they feel about it, feel comfortable expressing anxiety, worries, panic shame, guilt, whatever they might experience."

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Butler High School was closed Tuesday and will be closed again Wednesday for a teacher work day. Officials say counselors will be available at the school for anyone who needs it.