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

Evelyn, her brother Luis and their mother Miriam, 36, each had a piece 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 cause of death was caused by 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 piece 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. Happy Easter!!’

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

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 remains under observation in hospital and is in a stable condition.

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

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

Evelyn Fernanda Rocha Silva, 13, died on Tuesday afternoon Luis Fernando Rocha Silva, 7 years old, died in the early hours of this Thursday (Picture: Sharilyn Neidhardt)

She had travelled to the city last Wednesday, and visited the chocolate shop while wearing a wig to disguise her identity.

In chilling shop CCTV footage, accused Jordelia Pereira Barbosa, 36, is seen wearing sunglasses and a black wig, hiding her dyed blonde hair.

At the counter, she is seen holding a box of luxury mini Easter eggs before paying with a credit card.

After the delivery, Mirian received an anonymous call asking if she had received the package.

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