The Central Bureau of Investigation (CBI) is the domestic crime investigating agency of India. It operates under the jurisdiction of the Ministry of Personnel, Public Grievances and Pensions. Originally set up to investigate bribery and governmental corruption, in 1965 it received expanded jurisdiction to investigate breaches of central laws enforceable by the Government of India, multi-state organised crime, multi-agency or international cases. The agency has been known to investigate several economic crimes, special crimes, cases of corruption and other cases. CBI is exempted from the provisions of the Right to Information Act. CBI is India's officially designated single point of contact for liaison with the Interpol.

The Indian Police Service is a civil service under the All India Services. It replaced the Indian Imperial Police in 1948, a year after India became independent from the British Empire.