He was arrested following a clash with shopkeepers at Liaquat Bazaar for pointing a gun at them.
A case of rape under the Indian Penal Code and relevant sections of the Protection of Children from Sexual Offences Act has been registered, said the police official.
The father of the survivor lodged a missing report after she did not return home.
Based on the complaints lodged by the family members of the girl, a case has been registered against neighbour Manoj and his wife.
Six women and two girls were rescued from Jharkhand's Medininagar while being allegedly trafficked to Tamil Nadu.
According to the police, the accused were blackmailing the survivor that they would share her pictures on social media if she failed to cooperate with them.
The 35-year-old accused worked as a labourer at a farm owned by the girl's family.
The accused threatened and raped her on at least four occasions in April and May 2014, it was stated.
Sahina, a native of Chedakkanam, was arrested on charges of killing the infant, weeks after the incident in Badiaduka village.
The accused was booked under relevant sections of the IPC and the Protection of Children from Sexual Offences (POCSO) Act, they said.
The court sentenced the two to life imprisonment and also imposed a fine of Rs 50,000 on each of them in connection with the girl's rape.
The POCSO act makes it mandatory for persons to report sexual violence against minors to the authorities.
The child, who had gone missing from her home on June 30, was found dead in a pond near her house in torn clothes with multiple bruises on her body on July 1.
The child’s mother alleged that some villagers are trying to bail out the accused who has been booked by the Vilathikulam All Women Police, as his brother is a police constable.
The survivor's parents had left her with their relative in October this year before leaving for their native place in Assam.