US federal prosecutors have launched a probe into the media buying practices of Havas, as well as other members of the “big six” holding companies.

According to the Wall Street Journal, subpoenas have been issued to the holding company by the feds, based off of FBI interviews conducted within the past few months. Those inquiries were reportedly about the industry’s practices overall, as well as a 2016 investigation done by the ANA on transparency issues and other shady practices from agency partners.

Read the full Drum article here.