Shah Alam was apprehended here after he was called for counselling. His involvement in a case of gangrape came to light and was arrested.
"He was declared a proclaimed offender in the case. Bihar Police have been informed," a senior police official said.
Falak was admitted to the hospital with severe bruises in her body, head injuries and broken arms on January 18. Her head was badly smashed, she had broken arms, bite marks all over her body and her cheeks branded with hot iron.
She died on March 16.