Finding them after making them up.
As referred to by the DC Trawler (at The Daily Caller), the Department of Justice is going after the state of South Carolina because of its HIV/AIDS prevention policies in the state's prison system. From J. Christian Adams in the Washington Examiner:
Two unpleasant topics of conversation most of us avoid are the epidemic of HIV/AIDS among prison inmates and a variety of sometimes violent events resulting in transmission of the disease. Some states long ago implemented policies to protect the uninfected part of the prison population while providing exceptional medical treatment and counseling to the infected population.
In South Carolina, it has worked so well since 1998 that there has only been a single transmission of HIV/AIDS to a noninfected prisoner. All that may change, however, thanks to a threat from Eric Holder's Justice Department.
South Carolina received a letter from the now-infamous Civil Rights Division that the policy of keeping infected inmates at a designated facility, instead of scattered across the state in the general prison population, may unfairly stigmatize infected prisoners. To the Obama political appointees in the Civil Rights Division, this constitutes discrimination under the Americans With Disabilities Act.
The Justice Department objects to separate living facilities and specialized medical treatment for the HIV/AIDS prison population. Naturally, DOJ has threatened a lawsuit.