Former U.S. Olympic equestrian Darren Chiacchia was charged with not disclosing his HIV-positive status before having sex with his partner, violating Florida Statute 384.24(2), reports.

The 2003 Pan American gold medalist was charged with a third-degree felony. The charge could be upgraded to a first-degree felony if Chiacchia committed multiple violations of the crime.

According to a Marion County Sheriff’s Office report, Chiacchia and his one-time lover (whose name was withheld) had unprotected sexual intercourse between February and June of last year. The former partner told investigators he learned Chiacchia’s status when he came across medical documents during a trip to New York.

Chiacchia told his partner he was HIV negative at the beginning of the relationship, according to the arrest records, and his ex-lover obtained e-mails proving Chiacchia was aware of his status in 2008.

Bail for Chiacchia was set at $2,000. He posted bond and left Marion County Jail on January 21. Chiacchia said the arrest was “pretty surprising and outrageous.”