Rab yesterday detained a madrasa principal in Fatullah for his alleged involvement in raping around a dozen female students since 2018.
Al-Amin, 45, is the founder and principal of Baitul Huda Cadet Madrasa in Mahmudpur area. He was also the imam of a mosque.
On Sunday, Rab arrested Ariful Islam, 30, an assistant teacher of a private high school in Siddhirganj, for allegedly violating over 20 girls, said Alep Uddin, senior assistant director of Rab-11.
When the arrest news went viral on Facebook, a class-three student of Baitul Huda Cadet Madrasa saw it and asked her mother why the law enforcers did not arrest the principal of her madrasa, said the Rab official.
Hearing this, the mother asked her what did the principal do? Then she said the principal sexually harassed many girls at the madrasa, the official added.
Later, the mother informed Rab of the matter and Rab investigated the allegation and found that the principal raped 10 to 12 girls since 2018 and tried to violate many others.
Pornography was found in his mobile and laptop, the official said.
The principal with his family lives in quarters inside the madrasa.
When his wife was not at home or the madrasa was closed, he used to intimidate the girls with threats of beating, giving poor marks in exams, and outright failing them to make them go to his house, the Rab official said.
During primary interrogation, Principal Al Amin confessed that he had raped and sexually harassed girls, the official added.
The process of filing case was underway, said the official.