Verified answer

A detective is also known as a follow up investigator. This is a rank, not just a position that you walk into. You have to be promoted. Any report that is generated by the beat Officer, is turned over to a Detective for follow up. Undercover work is normally for specialized units, but a detective can participate if asked, just like a patrol Officer. The time element to become a Detective would vary within the departments.

DETECTIVES--DEPENDENT UPON DEPARTMENT SIZE AND ATTRITION--3-10 YEARS--BACKGROUND AS A MILITARY CID INVESTIGATOR HAS AN EDGE--COLLEGE TRAINING--DETECTIVE COURSES--GOOD OFFICER WITH KNOWLEDGE YOU HAVE GAINED KNOWLEDGE THROUGH READINGS AND ACTUAL EXPERIENCE.

DETECTIVES AT A PRECINCT LEVEL CAN PERFORM MULTIPLE TASK FROM COVERT OPERATIONS TO DEATH SCENE INVESTIGATIONS.