Woman who 'poisoned her husband and son with antifreeze' surprised by search history

Karen Leylen Oviedo reportedly dosed orange juice with ethylene glycol and forced partner Rolando Angel Aquino to drink it, two years after allegedly using the same method on his son

Prosecutors say Karen Leylen Oviedo poisoned her husband and son with antifreeze (

Image: Newsflash)

A woman accused of poisoning her partner and nine-year-old son with antifreeze two years apart has gone on trial in Argentina.

Karen Leylen Oviedo allegedly dosed orange juice with ethylene glycol and forced her partner Rolando Angel Aquino to drink it.

Prosecutors believe she used the same method to kill Aquino's 35-year-old son Elian in 2019.

Police seized Oviedo when they found a half-used bottle of antifreeze at the family home in Guaymallen, Mendoza province, after Aquino died in 2021.

And when they checked his smartphone's internet search history, they found "what is the deadliest poison", "how to kill with poison", and "how to delete a search history".

The prosecutor, Dr. Claudia Rios, described the evidence as “overwhelming”.

Karen Oviedo allegedly put the toxic chemical in orange juice and made her husband, Rolando Angel Aquino, drink it (

Picture:

news flash)

Paramedics had discovered that Aquino had collapsed on the floor of the family home in 2021 after Oviedo called emergency services.

He died in hospital two days later - Polo Judicial Prison Court heard on November 28 - and an autopsy revealed he had been given a dose of ethylene glycol.

An unnamed source familiar with the investigation reportedly told local media that Oviedo said "her husband had been feeling unwell for several days and was taking medication for some spots on his skin".

They added, "When we asked her to tell us what medication, she didn't know how to specify it and when we asked her...