(NY DAILY NEWS) – An Illinois woman who claimed she saw a “black shadow” enter two young children before she stabbed them a combined 150 times while babysitting was found guilty of both murders on Wednesday.
Elzbieta Plackowska’s lawyers argued that she was suffering a psychotic break when she killed her 7-year-old son Justin and 5-year-old Olivia Dworakowski in October of 2012. The slayings took place in Olivia’s home in Naperville.
Kristen Nedval argued that Plackowska loved the kids and wouldn’t have killed them “if she knew what she was doing.” However, State’s Attorney Bob Berlin used Plackowska’s own comments to investigators against her.
“There is no better evidence than the defendant’s own words: ‘I’m not supposed to, but I have to,'” Berlin told the court, according to ABC 7. “Those are the most important words she said. She knew what she was doing was wrong.”
“No one appreciated this defendant, and she was angry — she was angry at the world — and this is what she did,” the prosecutor said, according to the Naperville Sun.
It is believed that Plackowska stabbed her son approximately 100 times, and Olivia was stabbed 50 times. Two dogs were also found dead.