171, Duties of officers. –
(a) Duties of the Inspector-in-charge of the Detective Branch will be –

(i) To guide investigation of such cases and conduct such enquiries as ordered from
time to time by the Addl. Director General & Inspector-General of Police, Criminal Investigation Department. The Inspector-in-charge will collect criminal intelligence and build up records of criminals. He will also arrange surveillance and other preventive measures against known professional criminals (convicts and suspects) and receivers. To this extent his duties are different from that of the Inspector of this Department posted to a district. While the latter is essentially an officer guiding the investigation of controlled cases, the former is an officer who not only would guide the investigation but is also responsible for collection of Criminal Intelligence and building up of and maintenance of proper criminal records and arranging preventive measures.

(ii) To ensure that registers and files are properly maintained and that cases are
properly investigated by Sub-Inspectors and posted under him.

(iii) To detail the constables for watch duty and check the watch reports submitted by constables and utilize the information in proper ways. The watch reports should be maintained watcher by watcher.

(iv) To attend jail parades regularly and be familiar with the appearance of the criminals. He should also see that jail parades are attended by the staff, including constables, posted under him.

(v) To keep close liaison with the District Police.

(b) Duties of the Sub-Inspector will be -

(i) To investigate such cases as ordered from time to time by the Inspector-in-charge
of the Detective Branch.

(ii) To collect information about criminals, local and foreign, rowdies and anti-social elements and put up such information before the Inspector-in-charge.

(iii) To conduct such enquiries as ordered by the Inspector-in-charge.

(iv) To maintain such registers and files as ordered by the Inspector-in-charge.

(v) To assist in such surveillance and crime preventive work as detailed by the Inspector.

(c) Duties of the Assistant Sub-Inspectors – (i) To maintain such registers and files and do such other work as ordered by the Inspector-in-charge from time to time.

(ii) To undertake important watch duty as and when so detailed.