The Kerala police have said that the prime accused in sister Amala murder case--Satheesh Babu--has personality disorders as he has committed similar crimes in the past too.

Addressing media persons recently, ADGP Padmakumar said Satheesh found pleasure in attacking elderly nuns. Satheesh has confessed that it was him, who killed a Sister Jose Maria in Cheruthodu in July and police suspects his involvement in similar attacks against elderly nuns in different convents.

Days before Amala's murder, another nun was attacked in the same convent.

Four such attempts have been made since November 2014--at Catherine Convent in Koothattukulam, Snehabhavan in Bharananganam, Adoration Convent in Vadakara and St James Ascension Convent in Paika--and all the victims had a wound in the back of their heads.

Reports suggest that the suspect had attacked his teachers in the past and was dismissed from school. He was also punished for attacking his wife on her head in 2009.

The 38-year-old Satheesh, who hails from Munnad in Kasaragod, was arrested from an ashram in Haridwar, Uttarakhand on Wednesday night. He has reportedly confessed to have killed the nun during an interrogation by a team led by Palai DSP Suneesh Babu DS.

He was brought to Kerala on Sunday by a team led by the DSP.

Sixty-nine year of Sister Amala, who belonged to the Congregation of Mother of Carmel (CMC), was found dead under mysterious circumstances at the Lisieux Carmelite Convent in Palai on 17 September.

As per her post-mortem report, doctors had confirmed that the elderly nun was murdered.