According to the organization Treadwell founded, Grizzly People, five bears were poached in the year following his death, while none had been poached while he was present in Katmai. According to court records as reported by the "Anchorage Daily News", though, the guilty parties were charged with poaching wildlife along Funnel Creek in the preserve, an area open to hunting that borders the national park. According to several sources, including Nick Jans' book, "The Grizzly Maze", Treadwell camped only near the Katmai Coast, mainly in areas around Hallo Bay and Kaflia Bay, and never in or near the preserve. The only effective way to patrol all of Katmai National Park is by airplane, the method used by authorities.