The Investigative Services Division of the Nebraska State Patrol includes three areas of concentration, drug investigation, criminal investigation, and liquor enforcement.

Criminal investigators in Troop A provide a variety of services to the citizens in the Omaha metro area. With such a large and diverse community they are called upon to investigate thefts, computer crimes, pharmaceutical diversion and death investigations. Investigators participate in both the Sarpy and Washington County law enforcement intelligence sharing working groups. In addition they support the Internet Crimes Against Children (ICAC) task force, Guns, Gangs and Drugs task force, Cyber Crimes task force, Project Safe Childhoods task force and the State and Federal Environmental task force.

The Criminal Interdiction Unit (CIU) of Troop A is a unique group of investigators who work with federal authorities to interdict large shipments of controlled substances passing through Omaha or destined for locations throughout the state of Nebraska. In addition to those duties, they participate in the Metro Drug and Safe Streets task forces. Troop A Investigative Services is committed to working with the III Corp Drug task force, an alliance of law enforcement agencies in Dodge, Cuming and Washington Counties. III Corp aggressively targets street level dealer's intent on providing methamphetamine and other controlled substances to persons living in those three eastern Nebraska counties.

Troop A investigators also monitor licensed liquor establishment to verify that they are in compliance with the state's liquor laws. Enforcement of the laws pertaining to gaming, tobacco and underage drinking are also a part of their duties.