Medicare and Medicaid fraud have been perennial reporting topics since the 1960s, often requiring undercover techniques to amass specific details.
Reporters have presented as teachers or students to get an inside view of what goes on in schools and colleges.
Since the 1870s, journalists have been posing as patients or attendants to expose horrid conditions and treatment inside mental hospitals. Nellie Bly, incidentally, was not the first.
In efforts to get inside the fold, reporters have fellow-traveled with religious groups, posing as members or prospective recruits.
Reporter efforts to get inside the world of lobbyists, both on Capitol Hill and in the statehouses.
Undercover journalism has been the subject of heated discussions, especially since the late 1970s, and whenever an undercover sting causes a stir.
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.
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