Twelve-year-old Alexa Gonzalez scribbled "Lex was here 2/1/10" on her desk at Junior High School 190 in Queens. She also wrote "I love my friends Abby and Faith."
Her mother, Moraima Tamacho, says Alexa was released several hours after she was taken in handcuffs to a police station.
Education department spokesman David Cantor said it "shouldn't have happened." Cantor says "common sense should prevail."
Last month, the New York Civil Liberties Union filed a lawsuit alleging wrongful arrests and assaults by school safety officers.
Alexa has been assigned eight hours of community service, a book report and an essay on what she's learned from the experience.