Barbier has served as a special prosecutor for both the South Carolina Senate and House of Representatives Ethics Committees in matters involving alleged ethics violations of its members, including:
Ethics committee orders former House Speaker Bobby Harrell to repay misused campaign funds, pay fine, February 2016
Georgetown County senator reprimanded, ordered to pay more than $123,000 after ethics violations, November 2016
Former Moncks Corner lawmaker to pay $2,000 fine in response to sexual harassment charge, June 2106