The head of the police force in Tamil Nadu is the:

Director General of Police (DGP)
Inspector General of Police (IGP)
Superintendent of Police (SP)
Commissioner of Police

The head of the police force in Tamil Nadu is the Director General of Police (DGP). The DGP is the highest-ranking police officer in the state and is responsible for the overall administration and functioning of the police force. The DGP is appointed by the state government and holds office for a term of six years.

The DGP is assisted by a number of senior police officers, including the Inspector General of Police (IGP), the Deputy Inspector General of Police (DIG), and the Superintendent of Police (SP). The IGP is responsible for the administration of a group of districts, while the DIG is responsible for the administration of a single district. The SP is the head of the police force in a district and is responsible for the law and order situation in the district.

The police force in Tamil Nadu is divided into a number of branches, including the Criminal Investigation Department (CID), the Special Branch (SB), and the Traffic Police. The CID is responsible for investigating serious crimes, while the SB is responsible for gathering intelligence and preventing terrorist attacks. The Traffic Police is responsible for regulating traffic and enforcing traffic laws.

The police force in Tamil Nadu is a well-trained and professional force that is committed to maintaining law and order in the state. The police force has a long history of service to the people of Tamil Nadu and has played a vital role in the development of the state.