The case was tried and completed within seven months of the crime, unusually fast for Bangladesh. All 16 men accused — a group that included teachers and students — were found guilty.



“I am a hundred percent satisfied by the judgment,’’ said A.K.M. Musa Manik, Ms. Rafi’s father. “It may help other parents from losing their children.’’



Prosecutors said that Siraj Ud Doula, the head teacher who was accused of repeatedly fondling Ms. Rafi, had ordered the killing from jail, enlisting community leaders and students to pressure Ms. Rafi to drop the charges. When that failed, prosecutors said, he devised a plan to make it look like Ms. Rafi had immolated herself on the school’s roof.

Mr. Doula’s lawyers said he would appeal the verdict.



“I hope this verdict will be upheld in the higher court and the execution will be implemented as soon as possible,” said Hafiz Ahmed, the prosecutor.



When she died, Ms. Rafi was in the middle of her 12th-grade exams.



“She had a dream to be a teacher,” her father said.



Jeffrey Gettleman reported from New Delhi, and Julfikar Ali Manik from Rangamati, Bangladesh.





