GPS Tracking - Sales & Rentals

Global positioning system technology or GPS, is a device utilized to determine the location of a vehicle, person, or other asset to which it is attached, and to record the position at regular intervals. The recorded location information can be stored within the unit or transmitted to a location data base or internet connected computer using a cellular (GPRS), radio, or satellite modem imbedded in the unit. This allows the location to be displayed against a map backdrop either in real time or when analyzing the track later, using customized software.

Surveillance Private Investigators

Keeping in mind your budget, and to get the results you’re looking for, we gather the appropriate background information to complete the investigation in the most cost effective manner possible. Along with the video and still photography capabilities used by most investigators, Allegiance has a professional photographer on staff to help in documenting the evidence you seek. We serve individuals, attorneys and insurance companies.

Infidelity - Cheating Spouse Investigations

If you are checking this out, there is a good chance you have some uneasy feelings about the one in question. Well, unfortunately there may be a good reason for that. We will help you sift through the maze of unanswered questions. Who is this new friend of his from work? Who would be calling this time of night? Where is she? How do I know if he is telling me the truth this time? A free confidential consultation is just a phone call away. You deserve to know the truth. Call me.

Process Servers & Service

As a full service investigative agency, Allegiance Investigators also provides process service for you convenience. Call us for rates and questions. Need it done fast? We can accommodate same day service in certain critical situations. Give us a quick call to see what we can do for you.

Background & Information Checks

Allegiance Investigators will verify what you already have, or get the FACTS that you need to make the most informed decisions. We will get the information, and you decide what is relevant. Unscrupulous people can create almost any type of documentation or scenario nowadays. Let us actually verify the validity of the person or business, and give you the peace of mind you’re looking for.

Locate Missing Persons & Witnesses

We have extensive experience locating many types of people under varied circumstances. Be it a long lost relative, friend, debtor, old flame or a witness to a legal matter, Allegiance uses the latest web database resources along with methods culled from years of good old fashioned detective work to find the person you are looking for.


A lot of people think they can do an effective interview, but when you looking for more than just a person to ask questions call Allegiance Investigators. In reality, getting the truth from someone is an art. It takes training and experience to know the questions to ask along with the when and how of asking. I have personally done over 1,000 dishonest employee interviews, in addition to getting statements from witnesses and victims in all types of situations.

Contact Us Today

Allegiance Investigators
PO Box 87930
Sioux Falls, SD 57109