Forensic psychiatric expertise significantly contributes to clinical criminology. Interdisciplinary investigations, evaluation tactics, and the use of criminology indices are essential for psychosocial prognostic assessments of conflict, aggression, adaptability, and recovery. This study aims to assess the impact of the COVID-19 pandemic on forensic psychiatric expertise by analyzing demographic variables such as age, gender, background, and other relevant data including criminal records, forensic antecedents, personal pathological antecedents, diagnosis, and discernment. Our study included 186 patients categorized into pandemic and post-pandemic periods. Most participants were male, with no significant rural-urban distribution differences. During the COVID period, common criminal acts included aggression and child pornography, followed by attempted murder. A significant association was found between discernment and psychiatric disorders ( < 0.0011), with 67.6% of the patients lacking discernment having mental illnesses. Legal outcomes varied with discernment; 60.3% of patients without discernment required mandatory hospitalization ( < 0.0011). Medico-legal antecedents were more frequent during the pandemic, and safety measures were more commonly applied to those lacking discernment.