Marion County deputies have issued an arrest warrant for a U.S. Olympic equestrian star after he missed a court appointment on Thursday.

Darren Chiacchia, 49, is a part-time Ocala resident who was arrested on Jan. 20, 2010, and charged with sexually transmitting a disease to his partner.

Chiacchia, who was 45 at the time of his arrest more than four years ago, was scheduled to appear before a judge for a pretrial conference Thursday. He failed to appear, though, and so the judge has issued a warrant.

According to the original arrest affidavit, the victim told investigators that he and Chiacchia had unprotected sexual intercourse several times between February and June back in 2009. The victim told investigators that while the two were vacationing in New York, the victim stumbled upon some of Chiacchia's medical documents. The reports pointed to the fact that Chiacchia is HIV positive.

The victim told investigators that he had asked Chiacchia at the beginning of their relationahip if he had been tested and that Chiacchia told him he was negative.

The victim, at a later date, was able to provide investigators with an email from Chiacchia in which he admitted he knew he has been HIV positive since 2008.

In a recorded interview with Chiacchia, he stated that he did not tell the victim he was HIV positive because he did not feel the victim was trustworthy.

A judge later threw out the charges, citing there was no proof that the victim and Chiacchia had sexual intercourse.

In May 2013, the Florida Fifth District of Appeals overturned the judge's decision, however, and reinstated the charges.

While there has not been a federal law passed, 32 states have adopted state laws that protect innocent women, as well as men, from sexual partners who feel they shouldn't be required to disclose to their partners they have an STD.

In California, if a person has sex with another person and neglects to inform them of an STD, it is a misdemeanor. For HIV/AIDS, a person could be charged with attempted murder or face eight years in prison.

New York (the first state to actually convict someone) and Florida, as with California's law, makes it a misdemeanor for STDs other than HIV/AIDS, such as HPV, and could bring a sentence of up to one year in jail with hefty fines.

Chiacchia faces up to 30 years in prison under a Florida law passed in 1997 that makes it a felony for people with HIV to have sexual intercourse without informing their partners of their condition.