The Prosecutor General’s office of the Urals Federal district was named the official cause of death of a tourist group Dyatlov 1959 year. This reason was the avalanches and poor visibility. The young men fled from the scene of the stop the avalanche. And when the avalanche came down, because of poor visibility (from 6 to 16 meters) tourists just don’t see where the tent was set up and frozen. The investigation of this case back 1 year ago at the request of the relatives of the victims. From 1959 on the site of the death of Dyatlov’s group was conducted 9 examinations with specialists from various industries.