Carolina Andrade Zar, a 22-year-old medical student, tragically died from acute arsenic poisoning in Marília, São Paulo. Initially classified as a suicide, the case took a new turn following findings from the Medical-Legal Institute which identified the death as chemical poisoning. The investigation aims to uncover how Carolina gained access to such a hazardous substance within the interior of São Paulo State.

Upon discovering her unresponsive in May 2025, rescue efforts failed to save Carolina, who died the same day at a local hospital. Her cause of death prompted the Civil Police to launch a detailed investigation, particularly after the medical report suggested her death was not solely a result of self-harm. The authorities are now looking into the possibility that other individuals may have played a role in her tragic death.

The implications of this case are significant, as it raises serious concerns about safety and the accessibility of dangerous substances. The authorities' focus on potential external involvement highlights the need for thorough scrutiny of such incidents, especially involving young people. This case could spark broader discussions around chemical safety, mental health, and the responsibilities of educational institutions in providing a safe environment for their students.