DR. HANS GROSS, Professor of Criminology at the University of Prague and a pioneer in criminal investigation, said in regard to human actions that "not one of them happens by pure chance unconnected with other happenings, none is incapable of explanation; they are the fruits which must of necessity develop under the influence of nature and individual culture, fruits whose formation is explained by the organism producing them. They are attached to the individual as naturally and surely as the fruit emanates from the tree. We do not look to gather grapes from thorns or figs from thistles."