Md Alamgir Hossain, additional district and session judge of Kushtia, handed down the verdict on Wednesday in presence of convict Tapan Kumar Biswas, son of Rabindranath Kumar Biswas of Aruapara area in the town.
According to the case statements, victim Arpa Rani Paul went missing after she went out playing in the afternoon on March 28, 2014.
The next day a neighbour found her body inside a toilet. Police later recovered the body.
Convict Tapan, neighbour of the victim, was arrested after Arpa’s father had filed a case on the same day.
Tapan confessed during police interrogation that he had strangled the girl after raping.
The case was later shifted to Women and Children Repression Prevention court of Kushtia.