These are examples of undercover reportage that were considered to have crossed ethical lines or that caused major legal wrangles.
Journalists who infiltrated U.S.-based Nazi bunds, the Ku Klux Klan, the Gomorrah, and other secret societies and closed groups.
The work of groups such as James O'Keefe's Project Veritas and Lila Rose's LiveAction and their undercover operations.
Across the world, journalists have used undercover techniques to expose individual predators and as well as major sex crime rings.
Waste, fraud, graft, laxity, dilapidated conditions, corruption: Reporters have often used undercover tactics to investigate.
Reporters have taken the undercover route from slaughterhouses and chicken- and pork-processing plants to fast-food chains and supermarkets to understand the system.
Going undercover as volunteers or invited guests has gotten reporters an inside look at some U.S. political campaigns. So has shadowing the candidates in their off-hours.
Reporters have worked as guards or gotten themselves arrested -- sometimes with the aid of authorities and sometimes without -- to investigate conditions inside prisons and jails.
Powered by DLTS