Classmates attacked Pape and Amadou Drame, students at I.S. 318, on Friday, their father said.
Investigators found no evidence of bullying at IS 117, but said suspect may have been hassled elsewhere.
Noel Estevez, 14, will only be charged with manslaughter and will have his case sent to family court.
Noel Estevez's lawyers were granted more time to interview the "hundreds of kids we need to talk to."
Noel Estevez killed Timothy Crump outside Mount Hope school, police said.
Noel Estevez and the victim, Timothy Crump, had a long-running beef, according to sources.
Timothy Crump, 14, was stabbed to death by a teenager outside Joseph H. Wade Middle School, police said.
The mom of a girl bullied at Frances Perkins Academy said the school has been no help.
Two siblings were attacked by their classmates at Frances Perkins Academy, police said.
Brooklyn Brazilian Jiu-Jitsu teaches anti-bullying techniques in its "Shotokan" karate classes.
Morales hanged himself in his East Harlem apartment last year after being bullied, his family said.
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.
Friends and classmates lit candles at the station where Felicia Garcia, 15, was killed by a train.
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