Although no autopsy was performed on Francisco, the clinical analyses carried out while attempts were made to save his life revealed a high concentration of potassium in his body. A bloodstain was also detected on his clothing. At that time, those signs did not seem significant to his family, who were immersed in grief. However, they gained importance over time, as unexplained deaths and collapses began to repeat.
Of the 13 cases that went to trial —of which only the last two deaths were subjected to autopsy—, several showed puncture marks in areas of the body unusual for a medical procedure. In addition, levels of potassium and/or insulin in the blood were identified as incompatible with life and could only be justified by external administration. In other words, the human body could not have caused such an excess on its own.
Prosecutors argued that Brenda Agüero may have acted driven by professional motivations: she was allegedly seeking to stand out before her superiors, being the first to notice the babies' symptoms, raise the alarm, and thus earn a promotion from the Obstetrics area to the Neonatology sector.













