Determining the cause of death is a fundamental responsibility of forensic pathology. Certain cases require investigations beyond conventional autopsy procedures, particularly when an infectious disease may have contributed to death. Virology provides important laboratory methods for identifying viral infections associated with severe organ damage and life-threatening complications. Some viruses can affect essential organs, including the heart, brain, lungs, and liver. Depending on the pathogen and the patient's condition, these infections may contribute to myocarditis, encephalitis, severe respiratory disease, or other pathological complications. In suspected infection-related deaths, forensic pathologists may collect tissue samples and biological fluids for molecular testing. Polymerase chain reaction and related techniques allow the detection of viral DNA or RNA, while histopathological examination provides information about tissue injury and inflammatory responses. Immunohistochemical methods may also help identify selected viral antigens within affected tissues. Nevertheless, detecting viral genetic material does not automatically establish that a virus caused death. Some infections may be incidental, persistent, or unrelated to the fatal pathological process. Reliable interpretation therefore requires a comprehensive assessment of clinical history, autopsy findings, microscopic changes, and laboratory results. Proper specimen preservation and contamination control are equally important because postmortem changes can affect sample quality. By integrating virology with histology and forensic pathology, investigators can improve the scientific evaluation of unexplained deaths and distinguish potential infection-related findings from unrelated laboratory observations.