Jolly Shaju is suspected of killing six members of her family over a period of 14 years.

Kerala Police Crime Branch has solved the case of serial deaths in a Catholic family in Kozhikode district between 2002 and 2016.

As part of the probe, the police had opened family tombs on October 4 to examine the reasons behind the deaths of six persons from a family who died under mysterious circumstances.

Tragedy hit Ponnamattom family one after another over 14 years.

Eight years after her husband's death following consumption of cyanide-laced food, a woman and two others were arrested on Saturday, and investigations into the death of five others of the family were on, police said.

Kerala Police detained the family’s daughter-in-law Jolly, her second husband Shaju and another relative who supplied cyanide to carry out the murders.

"The accused did meticulous planning and charted the safe mode to conceal the murders. It was a challenging case, a police official told India Today.

CHAIN OF DEATHS

When retired teacher Annamma Thomas (57) collapsed and died in 2002, the family treated it as a natural death. After six years, her husband Tom Thomas (66) died of heart failure.

In 2011, their son, Roy Thomas (40), died in a similar manner. The autopsy report revealed poisoning before death. In 2014, Annamma’s brother, Mathew Manjadiyil (67), died similarly.

All four were buried in the cemetery of Lourde Matha Chuch Koodathai under the Thamarssery eparchy of Syro-Malabar Church. In 2016, their relative’s daughter, Alphonsa (2), died of a heart attack and within months her mother, Sili (27), also died.

WIDOW MARRIES RELATIVE

Meanwhile, Roy’s widow, Jolly, married Sili’s widower Shaju and claimed ownership of the family property with the support of the last will prepared by her father-in-law Tom.

Tom’s younger son Mojo, an NRI based in the US, challenged the transfer of ownership of family property and lodged complaints with the Crime Branch regarding the serial deaths.

Kerala is shocked by the murders carried out by a housewife in a reputed family who concealed it for 17 years.

POLICE UNEARTHS MYSTERY

"The accused made meticulous plans and charted a safe mode to conceal the murders. We have collected call detail records and are waiting for scientific evidence and exhumed the bodies of the deceased. It was a challenging case, a police official told INDIA TODAY.

The police interrogated Jolly and Shaju eight times and found discrepancies in their statements.

The police investigation found that Jolly was present in the locations when all six persons died. When the police asked Jolly to undergo polygraph tests, she refused on health grounds.

Police said Jolly, who was a commerce graduate, had claimed she was an engineering graduate and was working as a lecturer at the National Institute of Technology (NIT).

While verifying call details, police found that Jolly and Shaju were in constant touch during odd hours. When the dead bodies were exhumed, forensic experts found the presence of cyanide.

In all the cases, traces of cyanide had been found and it had been a case of slow poisoning, police said.

"We found that Roy's death had occurred due to cyanide, while the wife had claimed he had died of cardiac arrest," police officers added.

2 MORE ARRESTS

The Kerala Police has now arrested two more accused in connection with this case -- MS Matthew and Prajikumar. Matthew is a jewellery store employee and Prajikumar made ornaments for the jewellery store.

Jolly had known both of them for a long time. In fact, Prajikumar is the one who supplied cyanide to Jolly.

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