To ensure a network of trained investigators are able to work to the guidelines set by the GEIPAN, there are less than 20 volunteer investigators that are located throughout France. They can, if needed, do field investigations. Each investigator is required to conduct one to four investigations a year. The team is largely composed of people who are accustomed to working with the GEIPAN. They are chosen for their skills and availability but also have to take part in the GEIPAN training. The names of these investigators are confidential to avoid any possible disruption of their privacy or professional activities.