Purpose: The study's goal was to ascertain how leadership within the Nigerian police force was affected by police reforms with regard to the Directorate of Criminal Investigation. 
 Methodology: Based on functional leadership theory, the study was conducted. Police officers and members of the public completed questionnaires that were used to collect data. Descriptive statistics created with SPSS were used to evaluate quantitative data. The examination of qualitative data using content analysis. Edited and coded data were entered into SPSS for efficient analysis. Frequency tables and graphs were used to portray the quantitative data for rapid and simple comprehension. In prose, the qualitative data was given. 
 Results: The study found that the leadership in the police service was influenced by organizational structure, police education, organizational culture, and relationships with the local police force. According to the respondents, the organizational structure of the police department, police officer training, organizational culture, and the interaction between the police and the community all had a significant impact on police leadership. These elements benefited police leadership. The police leadership further had difficulties with the recent reforms. According to the responders, police leadership had not developed any plans to lessen the difficulties they were encountering. 
 Conclusion: According to the study's findings, the leadership at FCID headquarters is significantly influenced by organizational structure, police officer education levels, organizational culture, police-community interactions, and organizational structure. 
 Recommendations: According to the report, the oversight committee in charge of Nigeria's police reforms has to establish a culture of organizational change in order to deal with the dynamic leadership issues that are impeding the reform process as a whole. The public should be made aware of the importance of adopting a community policing policy through extensive advertisements. The study suggests that a follow-up study be done, but this time to examine how county commissioners' influence police leadership in a decentralized system.