Subject is exactly Veritas
James O'Keefe and Hannah Giles posed as a pimp and a prostitute for an undercover camera investigation. Some low-level employees of the organization provided earnest answers to the pair's questions about avoiding detection and tax evasion, among other things. Fox News and Andrew Breitbart's Biggovernment.com (which was launched with these videos) helped to push the story beyond conservative media outlets and draw attention to the pair's findings. As a result, and after considerable media attention, ACORN was defunded by Congress.
The work of groups such as James O'Keefe's Project Veritas and Lila Rose's LiveAction and their undercover operations.