Girl, 13, dies after eating poisoned Easter egg which killed her brother

Evelyn, her brother Luis and their mother Miriam, 36, each had a bit of the chocolate egg after it was dropped off at their home in Imperatriz (Picture: Newsflash/NX)

A 13-year-old girl has died five days after her seven-year-old brother died from a poisoned Easter egg.

Evelyn Silva died on Monday at Brazil’s Imperatriz Municipal Hospital where she has been hospitalized since Wednesday.

Her reason for death was attributable to a vascular shock that was linked to multiple organ failure.

The hospital said: ‘Unfortunately, the clinical condition showed serious and rapid deterioration without responding to treatment.’

Evelyn, her brother Luis and their mother Miriam, 36, each had a bit of the chocolate egg after it was dropped off at their home in Imperatriz.

The eggs were inside a plastic tray with a note reading: ‘With love, to Miriam Lira. Glad Easter!!’

Luis was found unresponsive together with his father Rafael desperately administering CPR.

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Caption: Crian?a de 7 anos morre ap?s comer ovo de P?scoa em Imperatriz, no Maranh?o. Suspeita ? de envenenamento. Al?m dele, a m?e e uma irm? est?o internados ap?s comer o mesmo ovo.
Provider: Globo(Credits: Sharilyn Neidhardt)

But he went into cardiac arrest and died at 4am last Thursday.

Miriam stays under statement in hospital and is in a stable condition.

Police have arrested Rafael’s ex-wife Jordélia Pereira, who admitted to buying the chocolate but denied lacing them with poison.

‘The evidence suggests that the crime was motivated by revenge, by jealousy, provided that the writer’s ex-husband is the present partner or boyfriend of the victim, who was poisoned along together with her two children,’ said Maranhão’s Department of Security Secretary, Maurício Martins said, as quoted by Brazilian news outlet G1.