César is a postdoctoral researcher in the Department of Forensic Medicine, Psychiatry and Pathology (Madrid-UCM); he is also an associate researcher at the San Carlos Institute of Health Research (IdISSC-Madrid) and assistant professor in the Pharmaceutical and Pharmacological Sciences Section of the Department of Cellular and Molecular Sciences (Lima-UPCH). His work currently focuses on the study of various post-mortem samples in the fields of forensics and archaeology. One aspect of his research is primarily aimed at assessing the quality of biological samples and DNA. The other aspect of his research focuses on the identification of chemical substances (including toxic ones) in biological and non-biological samples, using various methods of instrumental chemical analysis.