The Crime Investigation Department (Urdu: محکمہ جرم تفتیش; CID) is a crime scene investigation, interrogation, antiterrorism, and an intelligence bureaus in the provincial police service of Pakistan. The each CID bureaus are usually commanded by the AIG rank police official each appointed by the Inspector-Generals of the police services.
In Karachi, the CID teams have garnered and gathered counterintelligence information to take actions against organized crimes, and infiltrated the terrorist cells to track down the TPP and al-Qaeda operatives, alongside the FIA and the IB.
In 1902, the British government formed the CID bureaus in all over the British Raj. After the independence of Pakistan in 1947, the CID bureaus were equally distributed to Pakistan. In Punjab and Sindh, the CID bureaus were formed in 1947; during the successive years, the CID bureaus were established in Balochistan and Khyber-Pakhtunkhwa.