The 1948 prosecution of Frank LaSalle for abducting Florence Sally Horner is believed to have been an inspiration for Vladimir Nabokov in writing his novel "Lolita". Humbert Humbert, the narrator, at one point explicitly refers to LaSalle. The Mann Act has also been used by the U.S. federal government to prosecute polygamists (such as Mormon fundamentalists) because the U.S. has no federal law against polygamy. All U.S. states have anti-polygamy laws, but only in recent years have state authorities used them to prosecute bigamy. Colorado City, Arizona; Hildale, Utah; Bountiful, British Columbia; and sites in Mexico are historic locations of several Mormon sects that practiced polygamy, although The Church of Jesus Christ of Latter-day Saints has expressly forbidden polygamy since the start of the 20th century. Sect leaders and individuals have been charged under the Mann Act when "wives" are transported across the Utah–Arizona state line or the U.S.–Canadian and U.S.–Mexican borders.