Joseph Mathew (61), director of Pambady-based Aswasa Bhavan here, was arrested in July last for allegedly raping a 12-year-old girl.
He was out on bail in this case.
The institute was sealed by the police in July last following his arrest.
Four more girls recently came forward against Mathew with complaints of rape which allegedly happened early last year. Mathew went absconding after this,the police said.
The girls had given statements to district Childline officials, complaining about rape.
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He has been charged under the Protection of Children from Sexual Offences (POCSO) Act.
The institute was set up three decades ago with the aim of providing maximum care and education to the children of prisoners.
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