Any police officer in Indiana can pull you over and ticket you, as long as they meet one of two criteria. The officer has to either be in a fully marked car that is easily recognizable as a police car by the general public, or they can be in an unmarked car but have to wear a full police uniform that is easily recognizable as a police uniform by the general public. That is only to enforce the traffic code. If you are being stopped for an investigation of a crime that isn't in the traffic code, such as public intoxication or theft, there is no requirement for uniforms or vehicles.
In addition to the above stated facts, they apply anywhere in the state of Indiana's borders irregardless of the agency. Indiana is not like some states that have jurisdictional limitations like many people think.