The Criminal Investigation Department (CID; Sinhala: අපරාධ විමර්ෂණ දෙපාර්තමේන්තුව Aparadha Vimarshana Departmentuwa, Tamil: குற்றவியல் விசாரணை திணைக்களம்) is the primary investigative arm of the Sri Lanka Police and was established in 1870. It is headed by a director, who was of a Senior Superintendent of Police (SSP) Grade. However, since the late 1970s, the position of Deputy Inspector General of Police - CID (DIG/CID) was established.