The persistent prevalence of financial malpractice in Nigeria's public institutions has raised concerns about the effectiveness of traditional auditing systems in curbing corruption and mismanagement. This study investigates the role of forensic accountants in mitigating financial malpractice in Nigerian public institutions, with a focus on three key forensic practices: financial investigation, internal control evaluation, and fraud detection and prevention. The dependent variables examined include the detection of misappropriation of funds and enhancement of financial accountability. A descriptive survey research design was adopted, with data collected through structured questionnaires administered to 220 respondents drawn from public finance departments, forensic units, and regulatory agencies. Data analysis was conducted using descriptive statistics and multiple regression analysis through SPSS version 25. The results revealed a statistically significant and positive relationship between all independent variables and the mitigation of financial malpractice. Among the variables, financial investigation had the strongest impact on fund misappropriation detection and accountability enhancement. The findings confirm that forensic accountants are instrumental in reducing fraudulent activities and promoting financial integrity in Nigeria’s public sector. Based on the results, the study recommends the institutionalization of forensic accounting units in public institutions, periodic forensic audits, capacity building for accounting personnel, and the integration of forensic tools and technologies. These measures are expected to strengthen transparency, accountability, and public trust in Nigeria’s financial management systems.