subject: Private Detective and Investigator in Bangladesh [print this page] ASF International, detective and investigator are trained to perform physical surveillance, which may be high tech or low tech. ASF may observe a site, such as the home of a subject, from an inconspicuous location or a vehicle. Using photographic and video cameras, binoculars, cell phones, and GPS systems, detectives gather information on an individual. Surveillance can be time consuming.
