 "Wearing hidden camera and recording equipment, they do everything they can to put themselves in the thick of the action," according to "Las Vegas Review Journal".Arno and Vincent began calling themselves "thiefhunters" and soon amassed a valuable film archive of a (then) little-documented crime.In the preface of their book (see below), Arno and Vincent claim to have initially suffered inner turmoil created by failing to prevent incidents occurring in their presence, but they overcame that discomfort after realizing the value of their study.