philipp petrovich tyurin (born 1910 in sumerki, ryazan governorate, russian empire - 1947 in leningrad, rsfsr), also known as the leningrad maniac and the hellraiser, was a soviet serial killer who operated between 1945 and 1946 in leningrad. according to investigators, during this period tyurin murdered 14 people, but he himself confessed to 29 total murders.