RESUMEN
Munchausen syndrome by proxy (MSBP) is a form of child abuse that describes children whose parents or caregivers invent illness stories and substantiate the stories by fabricating false physical signs. Through this case report, a serial MSBP case is presented along with psychiatric evaluation of the perpetrator mother who was sent to the Forensic Psychiatric Observation Department of the Council of Forensic Medicine to assess whether she has any mental disorder. Although there are several studies on MSBP, we present this case because the perpetrator mother was caught on the camera surveillance system of the hospital while closing the nose and mouth of the victim for fabricating the illness, and she also said that she had done the same thing to her two elder children to exclude their illnesses. Her two children had died and could not be diagnosed. Moreover, we discuss the psychopathology of the perpetrators, which is a less known area of MSBP. This is a very serious form of child abuse, with a high risk of repetition, and failure to diagnose might result in the death of the child.