The Nassau County Police Department works t provides a range of safety and crime prevention and detection services. It manages Bureau of Special Operations (B.S.O.), which is responsible for the selective enforcement of crime patterns and planning and initiating high-risk search warrant and tactical entries. The department s Special Investigations Squad is responsible for the security of dignitaries and governmental appearances. The Nassau County Police Department also works to investigate and coordinate information and intelligence related to street gangs. It operates a traffic safety section that works to offer accident analysis solutions. The police department is governed by Nassau County in New York.