The case revolves around the tragic murder of eight-year-old Miratzi Kairelis Perez Mejias in São Manoel do Paraná, Brazil. The suspect, Daniel Luiz Ferrari, 25, had a court-ordered electronic monitoring device that signaled a low battery three days before the crime on February 12, 2023. Miranda's mother, who is the current partner of Ferrari, was also reportedly attacked by him during the incident which led to the kidnapping of the child.

Upon discovery of the body of the girl on February 15, it was reported that Ferrari died in a confrontation with law enforcement. He allegedly attacked police and firefighters while they searched for him and Miratzi, using a knife. The police confirmed they followed the necessary protocols after the monitoring signal was interrupted, including notifying the court regarding Ferrari's situation prior to the crime, although the actions taken post-interruption were evidently insufficient to prevent the tragic events that unfolded.

This incident raises important questions about the effectiveness of electronic monitoring systems in preventing violent crime, especially concerning known offenders. There is public outcry for accountability and better measures in place to protect potential victims from offenders who have shown violent behavior, emphasizing the need for a review of the laws governing electronic monitoring in Brazil and the responsibilities of authorities in such cases.