The students spoke out in front of I.S. 109, where Gabrielle Molina went to school.
Gabrielle Molina, 12, hanged herself Wednesday in her family's Queens home, cops said.
Winners of the DA's anti-bullying video challenge played prosecutors for a day.
Vincent Tomeo, a former Francis Lewis H.S. teacher, says he was the victim of cyberbullying attacks.
Manhattan DA Cy Vance Jr. is speaking to students this week about the cyberbullying crisis.
From harassing text messages to hacking someone's Facebook account, cyberbullying comes in many forms, advocates said.
The Human Rights Commission said Monday that it opposes a new cyberbullying bill because it's redundant.
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