If you’re looking for high quality and personal service, you’ve come to the right place. At CKI-National Investigative Services-US we’ll give you the attention and personal service you’ll come to expect and enjoy. We offer the best in Civil, Criminal and Insurance Investigations and Protective Services. CKI-National Investigative Services-US has been located in Wichita, KS since 1982. Let us put our experience to work for you.