Former Iowa State University scientist Dong-Pyou Han, has been sentenced to jail for more than 4 years for faking HIV vaccine trial data. The guilty scientist had altered blood samples by contaminating it with rabbit blood to make it appear he had achieved a breakthrough toward a potential vaccine against HIV. He was sentenced on Wednesday to more than 4 ½ years in prison for making false statements in research reports. Dong-Pyou Han, must also pay $7.2 million to a federal government agency that funded the research. He entered a plea agreement in February admitting guilt to two counts of making false statements.