3 star in police means the rank of officer or rank of inspector, or a similar supervisory role.
For example in India, the inspectors of police have 3 stars and in some police departments, the 3 stars can represent a higher ranking officer such as a police captain.
The exact meaning of the 3 stars in police can vary depending on the specific police agency.
The stars are often used as a visual indicator of an officers rank or their supervisory level.
And the 3 stars often signifies the rank of the inspector or supervisory position in many police departments.
The meaning of these stars and their number can vary between police departments and some police departments use the stars for the amount of service years and others use them for rank.
The Chief of Police is the highest ranking officer in the police department.
And as a general manager of the police the department, the Chief of Police or COP is responsible for the planning, operation and the efficient administration of the police department under the authority of the board of police commissioners.