South Dakota's Premiere Investigative Agency -
Allegiance Investigators

Allegiance Investigators is located in Sioux Falls, South Dakota and is owned by Pat and Kathy McManus, a husband and wife team. Together, they have combined experience of over 40 years in the investigative and surveillance industry, offering confidential investigations to attorneys, businesses, corporations, insurance companies and private individuals throughout the State.

Our investigative techniques and knowledge are the result of diverse experience and education in law enforcement, locating missing persons and assets, skip tracing, fraud, employee and witness interviews as well as marital and other domestic matters, including process services.

Our Sioux Falls Private Investigators are dedicated to finding the truth and offering you the facts so that you can make the most informed decision is our number one goal. Our experienced private investigators will get the information that you need in a professional, timely, confidential, and cost effective manner. We are at your service 24 hours a day. If needed, we provide daily updates on the progress of the investigation.

Each case is unique, therefore we recommend that you call and speak to us about which type of investigative approach best suits your needs. If we don’t have a solution to your problem, our nationwide network of contacts most likely will.

When you need the services of an experienced and trusted investigator in Sioux Falls, the surrounding area or anywhere throughout the state of South Dakota, contact the experts at Allegiance Investigators anytime of the day for your initial FREE confidential consultation.

Contact Us Today

Allegiance Investigators
PO Box 87930
Sioux Falls, SD 57109