Infants who are born between 24 hours and 1 year of age require extreme caution in their care due to their fragility. However, if there are multiple risk factors associated with the infant, caretaker, household, and surrounding circumstances, providing proper and appropriate care becomes problematic. This difficulty in caring for infants can contribute to abuse, neglect, or even death. This study investigates unexplained infant deaths that occur in the presence of multiple psychosocial risk factors. This study aimed to explore the relationship between various psychosocial risk factors and sudden, unexplained infant deaths. We examined nine cases from the autopsy archive of the National Forensic Service using a statistical approach. Among these cases, three were subject to legal action, while six were closed without further legal process. Although it was difficult to establish a clear relationship between death and abuse or neglect in the six cases, all were found to have experienced a harsh environment that was similar to abuse or neglect. We discuss the implications of our findings for understanding infant deaths and legal outcomes and propose a new framework to understand the deaths of infants.