Department of Homeland Security: Integrity of O-1B and O-2 Visa Issuances (Fiscal Year 2016 Report to Congress) [open pdf - 355KB]
"The following report addresses the House and Senate Appropriations Committees concerns in regard to ensuring the integrity of the O-1B and O-2 visa petition process. The report outlines the O visa petition process including: establishing eligibility; the consultation process; and mechanisms that USCIS [U.S. Citizenship and Immigration Services] uses to detect and prevent fraud. The report includes fraud statistics from FY 2013 to FY 2015. USCIS has not identified any additional fraud identification and prevention measures that are needed with respect to the O nonimmigrant program."
U.S. Department of Homeland Security: http://www.dhs.gov/