Scipio Sighele

He is famous for the work ''The Criminal Crowd''. In this work, he mentioned Enrico Ferri, a contemporary colleague and friend, several times. They shared similar views on the influence of a crowd on its members. This fundamental idea was also described by Gabriel Tarde and Gustave le Bon. Sighele and Tarde debated how to determine and assign criminal responsibility within a crowd.
Sighele died in Florence, aged 45. Provided by Wikipedia