A Rare Case of Homicidal Asphyxia Involving Combined Mechanisms By Multiple Assailants

Mechanical asphyxia is well documented in forensic pathology; however, deaths resulting from the simultaneous action of distinct asphyxial mechanisms remain uncommon and challenging to interpret. We report a case of homicidal asphyxia in a 20-year-old man in whom smothering, ligature strangulation, and traumatic asphyxia acted concurrently. The victim was found inside a locked suitcase. External examination revealed facial cyanosis, subconjunctival and scleral hemorrhages, and patterned cervical abrasions. Autopsy disclosed extensive hemorrhagic infiltration of cervical soft tissues with fracture of the greater horn of the hyoid, blunt-force injuries of the thoraco-abdominal wall with mesenteric hemorrhage, and pulmonary contusions associated with features of acute pulmonary emphysema. Histologic examination confirmed the vitality of the lesions. Toxicological analyses were negative for alcohol, narcotics, psychotropic substances, and common drugs of abuse. Investigative findings, including video surveillance and concordant suspect statements, documented that the victim was restrained and subjected to simultaneous airway occlusion, neck compression, and thoraco-abdominal compression by multiple perpetrators. The integration of pathologic, imaging, and investigative data supported the interpretation of a rapid fatal process in which airway occlusion (smothering), soft-ligature neck compression, and thoraco-abdominal compression acted synergistically to impair ventilation and perfusion, consistent with homicidal mechanical asphyxia. This case highlights the practical challenges of causal attribution when multiple asphyxial mechanisms co-occur and underscores the importance of structured reporting based on multiparametric correlation between pathologic and investigative evidence.