Contact a CSI Investigator for a free consultation and quote! Cole Surveillance & Investigations (C.S.I.) is a TN licensed private investigation company (#1407) located near Nashville Tennessee (TN). Our private investigators are comprised of trained, licensed professionals and are dedicated to providing our clients with credible and accurate results at an affordable rate. When you need a private investigator in Tennessee please contact us for a professional and strictly confidential meeting. We can meet at our Lebanon office or a location of your choosing. CSI has earned the reputation of being straightforward, aggressive and responsive. CSI keeps our clients informed and aware of every aspect of their investigation and above all, confidential. We take pride in our work and our work-pro