The Investigative Services Division of the Nebraska State Patrol includes three areas of concentration: drug investigation, criminal investigation and liquor enforcement. The Investigative Services Division in Troop D-North Platte has one Lieutenant, two Sergeants, and eight Investigators. Civilian employees are also a critical component of the Investigative Services Division helping with intelligence gathering, evidence and report processing.

Criminal and Drug investigators with the Troop E work cases throughout the eleven counties of the Nebraska panhandle. NSP Troop E is also part of the WING (Western Nebraska Intelligence & Narcotics Group) Task Force, cooperating with numerous law enforcement agencies in the area.