Traditionally, we classify criminal tattoos characteristic images. Each gang has tattoo symbol. The symbols serve as a unique gang sign. Popular criminal tattoos are Japanese Irezumi for Yakuza. Other popular tattoos are Russian, New Mexican mafia and etc. The members of criminal groups get tattoos on visible parts. Thus, they immediately catch attention. It may be a tatto on fingers, hands or even face. Nonmembers of gangs can’t get criminal tattoo. Still, if someone has criminal tattoo, he or she will some day be asked for it.