Revealed: Brazilian cops 'arrested daughter-in-law in poisoned Christmas cake case after furious relative accused her of insincere gesture at victims' funeral'

Detectives investigating a Christmas cake food poisoning that left three members of the same family dead began looking into the daughter-in-law of one of the victims after a row at a funeral last month. Deise's mother-in-law Zeli Dos Anjos made the traditional festive treat which killed three members of her family at a Christmas party at Torres near Porto Alegre in southern Brazil on December 23. Deise Moura was held by police at the home she shares with husband Zeli dos Anjos prepared the traditional 'Bolo de Natal' festive treat for a family afternoon coffee Pictured: The Christmas cake that was consumed by guests on December 23 Tatiana's 10-year-old son Matheus, Zeli's great nephew, was treated in hospital and only released on Friday, while Maida's husband Jefferson was also treated but Neuza's husband Joao did not eat any cake and was unaffected. Deise was taken initially to a police station at Canoas, then to Torres police station and is now in the women's jail in the city The woman was arrested for triple homicide and a triple attempted homicide The mother of one had been arrested at her home in Nova Santa Rita late on Sunday Investigative sources confirmed Paulo's body would be exhumed next Thursday for further analysis as none were taken after doctors at Torres hospital ruled he had died from food poisoning. 10 year old Matheus Marques da Silva who survived eating the poisoned cake with Father Leonir Alves at the hospital in Torres, Brazil Several members of the family died after eating the cake Neuza Denize Silva dos Anjo, 65, was rushed to hospital in critical condition before dying the following day Maida, a retired teacher, was the first to die on Christmas Eve, Neuza passed away a few hours later, followed by her daughter Tatiana.