A. Willis Investigations Our private investigators takes pride in working closely with our clients so that each investigation is tailored to provide the client with the services they need and expect while ensuring that the cost of the investigation remains within the client's budget requirements. Our results are completed and delivered in a timely manner to the client. We are a full service investigations company, based in Houston , Texas , and serves the corporate community as well as the private individual. We service the entire Houston and surrounding areas. A Willis Investigations is fully licensed and insured with the State of Texas. Call today for a consultation