Krishna, aged 70, a carpenter, was known to the family of the victim, Vanasthalipuram Police Station Inspector S Murali Krishna told PTI.
According to a complaint lodged by the minor girl's parents, the accused allegedly raped her on December 28.
The accused allegedly showed the girl "porn" videos and later "sexually assaulted" her in his house, the Inspector said, adding, they registered a case under relevant sections of IPC and the Protection of Children from Sexual Offences Act (POCSO Act).
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