Yegor Sozonov was born on May 26, 1879 in Petrovskoye village of Vyatka Governorate in a family of old believers. In the course of time some old believers' surnames (for instance Sofronov) changed the spelling. Sozonov, too, changed its spelling into Sazonov. His father Sergey Sozonov made a fortune as a timber merchant and moved his family to Ufa. Yegor Sozonov used to recollect: «I stem from a right-thinking, religious and pro-monarchy family of peasants. The family moved from the village to town and became rich through the use of Bashkir forests. It happened rather late when I was 10-11 years old. My soul was fully influenced by the family; it was hostile to any protest about the way of Russia's living. My father's house is decorated equally with icons and tsar portraits». Yegor spent his childhood and teen years in Ufa. Being the best student of Ufa gymnasium, he entered initially the law department and later the medical department of Moscow University. He dreamt of becoming a local doctor.
Initially Sozonov stayed away from politics, but when 183 revolutionary-minded students in Kiev were sent to soldiers, and after assassination attempts on tsar officials, he got interested in the revolutionary movement. He summoned his University friends to oppose the government's decision.
In 1901 he was expelled from the University and sent back to Ufa. On March 29, 1902 his parent's house on the corner of Bolshaya Uspenskaya and Spasskaya Streets (demolished in the mid-2000s) was checked. The police found decisive evidence: addresses of places of secret meetings. In Ufa prison he suffered from bad attitude and went on hunger strike. Then he escaped the exile in Yakutiya and left for Switzerland, where he joined the party of socialist revolutionaries and entered a combat organization.
Nevertheless, his father still believed that his son would settle down and marry. He even built a one-storey brick mansion for son's future family up the same street. One may suppose that the father learned about his son's affair with the daughter of an important Moscow official. An unknown architect followed the traditions of the brick style. Entrance gates in the form of a brick arch were situated to the right of the house. Except for being one-storey the mansion strongly resembled the house of Sultanov on Voskresenskaya (nowadays Tukayev) Street. The porch was in the yard. Unfortunately, during the reconstruction all the decorations of the brick style were plastered; the porch was removed to give space for additional floors. The gates were also demolished to let the construction equipment in the yard.
However, it seems that Yegor Sozonov never saw this house. With a fake passport he returned to Russia. On July 15 (28), 1904 together with his fellow member of the combat organization in St. Petersburg he murdered Minister of Internal Affairs V. Pleve. Sozonov was badly wounded, deprived of any rights and sent for life-long penal servitude. From Butyrskaya prison he was moved to Nerchinnsk mines. The amnesty of 1905 shortened Sozonov servitude. At the end of 1907 he was moved to Zerentuy penal servitude. The new prison director Vysotsky ordered to give a flogging to political prisoners because of a tiny cause. The rate of suicides increased. On November 1910 in order to prevent the suicides and to draw public eye to the problems of the prisoners Yegor Sozonov took poison. He did so only two months before the end of his servitude. He was buried in Gorny Zerentuy. On May 25, 1917 his remains were moved to Ufa and buried at the Sergius cemetery. Nowadays in the place of the demolished monument they erected a grey obelisk.
On May 1, 1918 Bolshaya Uspenskaya Street of Ufa was named after Yegor Sazonov. In 1937 the authorities had to name one of the central streets after Stalin, and so they named the former Sazonov Street after Stalin, and named Stalin Street (previously Budanovskaya Street) in the downtown after Sazonov.