Welcome to David Liston Investigative Services! David Liston Investigative Services specializes in providing videography, evidence photography, and Trace/Locate support to Puget Sound legal professionals. Audio, Video, Stills and Covert Video capabilities. Litigation support media and Locates. Locating your defendant or witnesses DLIS will use the most advanced technology available to search billions of records to find your missing defendant or witness. Using any combination of previously known data, such as name, address, SSN, neighbors, relatives or phone number. Sound logic and data analysis, inductive reasoning and good old fashioned phone work sort the results into intelligence you can depend on. You will promptly receive your reports, as detailed or as condensed as you like. Call (253) 212-0544, or use the contact form here to discuss your needs and a free estimate. Documenting your deposition and evidence Please browse the Gallery for high-resolution examples of recent accident scene photography. You'll find the state-of-the-art evidence and deposition equipment we place at your service... These tools will save you hours of travelling to visit an accident scene, videos that can place juries in the driver's seat. Still photos will preserve the extent of your client's injuries in high-res, high-impact digital media. All results are delivered quickly to you in your preferred format. Click here to contact DLIS. View Site Map