Which of the following is NOT a primary duty of a patrol officer?

Investigating complex crimes is not considered a primary duty of a patrol officer because this task typically requires specialized skills and resources that are more aligned with detectives or specialized units within a police department. Patrol officers are primarily responsible for maintaining public safety through visible presence in the community, responding to calls for service, conducting routine patrols to deter and detect criminal activity, enforcing laws, and building relationships within the community. While patrol officers may be involved in initial investigations or gather evidence at crime scenes, detailed investigations into complex crimes, which often involve significant case work, analysis, and follow-up, are usually handled by investigators or detectives with more advanced training and resources.