Facebook whistleblower testifies before Senate Commerce subcommittee | USA TODAY

Facebook whistleblower Frances Haugen testifies before Senate Commerce consumer protection panel. RELATED: Illinois whistleblower is feeling the backlash of fellow cops Who is Frances Haugen, the whistleblower who is taking on Facebook? On Sunday night, Haugen told 60 Minutes on Sunday night that she was the source of leaked documents to The Wall Street Journal and to lawmakers. It was the first time she spoke publicly.