The man held in connection with murder of a 69-year-old nun in Pala had confessed during interrogation that he had attacked 83-year-old Sister Jose Maria, another nun, at her convent near Erattupetta in April this year, police said.
Satheesh Babu has been remanded in police custody for the probe into the recent murder of Sister Amala in Lisieux Carmel Convent at Pala.
She was found lying unconscious in a pool of blood on April 17 and was admitted to a private hospital. She died a few days later due to injuries to her head, police had said.
Officials said during postmortem, a deep wound has been detected on the skull of the nun. An attack with a sharp edged weapon is suspected to have been the reason for the wounds, they said.
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Babu, who was arrested by Uttarakhand police from Haridwar last week and has been described by Kerala police as a psychopath, had allegedly stolen Rs 70,000 from Sacred Heart Convent.
Babu, a native of Kasaragod, who was absconding after allegedly killing Sister Amala, was brought to the state last week after Kerala police secured his custody through transit warrant from Uttarakhand police on September 25.
He was produced before the First Class Judicial Magistrate court in Pala yesterday and was remanded in police custody.
Police, which had conducted the probe with the help of its cyber cell, have said that Babu is a serial offender targeting convents.