The Criminal Investigation and Detection Group (CIDG) is the primary investigation arm of the Philippine National Police.

The Criminal Investigation and Detection Group was established as the Criminal Information Service whose origin traces back as early as 1901 shortly after the establishment of the Philippine Constabulary when the Information Section was established as mandated by the Section 2, Article 255 of the Philippine Commission. In 1920 the Information Division was integrated with the United States Army Forces in the Far East and its detectives participated at the Battle of Bataan, many of which also were forced to participate at the Bataan Death March. ^[1]

After World War II, the Military Police Command was activated in lieu of the Philippine Constabulary. A Criminal Investigation Branch of the G2 to investigate crimes and maintain peace and order. This division remain operational after the independence of the Philippines from the United States on July 4, 1946. ^[1]

In 1953, the Philippine Constabulary was integrated to the Armed Forces of the Philippines and a Police Affairs Division was created. A Criminal Laboratory was made by the division to support constabulary units with background in scientific criminology. On January 19, 1953, the General Headquarters of the Armed Forces issued General Order Nr. 14 which resulted to the reorganization of the defunct Philippine Constabulary into two main components, a general staff unit, called the Intelligence Division or C2, and an operating special staff unit, the Criminal Investigation Service (CIS). ^[1]

On October 28, 1955, a Police Intelligence Branch was created by the CIS and in 1958 the investigation body was elevated to a division. The CIS, adopted Criminal Investigation Office as its new name on October 5, 1960 but reverted to its old name two months later. Criminal Investigation Office on October 5, 1960. It was again renamed to Criminal Investigation Service Command (CISC) in 1989 and to its present name in 1999.^[1]

Under the Director, it has three (3) deputies: ^[2]

• Deputy Director for Administration,
• Deputy Director for Operation, and
• Chief of Staff

It has also Divisions such as: ^[2]

• Administrative and Record Management Division,
• Investigation Division,
• Operation Management Division, and
• Intelligence Division

The Group also have: ^[2]

• Legal officer,
• Police-community relations officers,
• Public information office,
• Secretary to Division Staff,
• DLOS,
• Personnel Record Management Section,
• Budget & Finance,
• HRDDS,
• GPSMU,
• Station Health Unit,
• Logistic Section,
• Case Referral Monitoring Center,
• Technical Support Section,
• GESPO, and
• Office of the Supervisor for Non-Uniformed Personnel

The CIDG has also have the following operational units: ^[2]

• Anti-Fraud Commercial Crime Unit,
• Anti-Organized Crime Unit,
• Anti-Trans National Crime Unit,
• General Services Division,
• Acting Chief, Major Crimes Investigation Unit,
• Women and Children Complaint Unit, and
• Detective and Special Operation Unit.

Its regional units (RFUs = Regional Force Units) are: ^[2]

• CIDG NCR
• CIDG RFU 1
• CIDG RFU 2
• CIDG RFU 3
• CIDG RFU 4A
• CIDG RFU 4B
• CIDG RFU 5
• CIDG RFU 6
• CIDG RFU 7
• CIDG RFU 8
• CIDG RFU 9
• CIDG RFU 10
• CIDG RFU 11
• CIDG RFU 12
• CIDG RFU 13
• CIDG RFU 14 (Bangsamoro)
• CIDG RFU 15 (Cordillera)

Acting in italic.

CIDG was used by the Philippine TV series Ang Probinsyano until 2019. The main protagonist, some antagonists and some supporting casts of this series are playing as police officers of the group. ^{[23] [24] [25]}