Which rank is permanently held by an officer who has demonstrated investigatory skills as a Lieutenant of BCI?

The rank permanently held by an officer who has demonstrated investigatory skills as a Lieutenant of BCI is Lieutenant. This rank signifies that the officer has successfully proven their ability and competence in investigative procedures and leadership within the Bureau of Criminal Investigation (BCI).

In law enforcement structures, a Lieutenant often serves as a key supervisory officer, leading investigations, managing personnel, and ensuring that proper procedures are followed. Attaining this rank indicates a level of expertise and respect within the department, particularly in areas concerning criminal investigations.

While other ranks such as Sergeant, Captain, and Major exist, they denote different responsibilities and areas of focus within the organization. Sergeants typically oversee officers and are involved in frontline policing, while Captains and Majors hold more strategic managerial roles, often supervising multiple units or divisions. The position of Lieutenant is directly linked to the investigatory skills that were emphasized in the question.