THE STRUCTURE OF THE LIBERTY CITY POLICE DEPARTMENT (IV:MP)
LCPD Cadet: 
This is the law-abiding Citizen who has been accepted into the academy and is learning, being trained, and will later be examined. If they pass the exam, they are promoted to the rank of Officer.
LCPD Officer:
A Police Officer performs basic duties such as: responding to the scene of a crime or an accident; interviewing suspects and witnesses; writing crime reports; responding to radio calls; monitoring any suspicious activity of ongoing crimes; coordinating vehicular traffic; visiting open businesses such as banks, markets, department stores, and service stations to establish a rapport with owners; booking suspects and evidence and transporting them to the appropriate Police Department facility; responding to citizens’ and visitors’ questions; and preparing Patrol Reports.
LCPD Senior Officer:
The Senior Officer is an officer that has been serving with the Department for a long time. They are considered to be the guiding light to other Officers, and are often the first to rush in when duty calls. They are assistants to the Sergeant, and overall an experienced form of a standard Officer.
LCPD Sergeant:
Much like a department manager, a Sergeant aids in management of or leads a specific shift consisting of Police Officers. A Sergeant is required to provide instruction to assigned staff in the operation of their required duties. The basic capacity of a Sergeant is field supervision, but administrative and specialized assignments are also available. Some Sergeants perform initial and follow-up investigation of crimes and perform surveillance work to detect or prevent crime. He also supervises a group of Police Officers and/or civilian employees and instructs them in the performance of their assigned duties.
LCPD Lieutenant: 
A Lieutenant, being part of the Command Team, takes the task of general departmental administration. This includes handling of officer files and records, reinstatement and transfer requests, deliberations on departmental changes, as well as the expectation to conduct regular supervisory patrol. Who is the lower Command staff rank and is expected to perform outstandingly in both field and administrative duties.
LCPD Captain:
A Captain is responsible for inspecting and overseeing the functions of the patrol officers to ensure compliance with the Department policies, procedures, regulations, and standards; supervising the administrative and support functions personnel; inspecting personnel, facilities, and tactics for safety and/or training needs; maintaining liaison with numerous municipal, governments, civic organizations, and private citizens to establish and maintain rapport to facilitate Department functions and to promote neighbourhood safety and community policing programs.
LCPD Deputy Chief: 
The Deputy Chief of Police keeps the Chief of Police informed of all operational activities on a day-to-day basis as well as directs the activities of either the administrative or operational side of the Police Department. Who takes the Chief role during Chief’s absence and is responsible for smooth operation of the department.
LCPD Chief of Police:
The Chief of Police is the highest-ranking officer in the Liberty City Police Department. Who is the head of the Command and Upper Command Staff. Although the Chief always has the final world in decisions and manages the forum structure and has the administrative rights over the forum, Who is responsible for the efficient administration and planning as well as directing plans and coordinating their fellow officers. Their aims is to minimize crime risks across the entire city and to secure peace over the community through deployment of police units under their command.
N.O.O.S.E. Cadet: 
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The National Office of Security Enforcement Cadets are the members who were invited to the N.O.O.S.E. team, who have been accepted in the team after filling an application, or have forwarded a Letter of Interest (LCPD Officers+ only). The N.O.O.S.E. Cadets do not have any role or duties besides preparing themselves for their entry talk through. After they pass their entry talk through, they will be a general member of N.O.O.S.E. and will be directed to one of the National Office of Security Enforcement’s sub-divisions for further training.
N.O.O.S.E. Commander:
The N.O.O.S.E Commander is the leader of the National Office of Security Enforcement, and oversees the department. They also help with decisions made by their divisions staff. The Commander is deemed to be the most skillful of N.O.O.S.E. Operatives and the LCPD. They must master tactics as well as weapons and vehicles usage. They are not necessarily members of the LCPD Command Staff, however such situations are rather rare.