Court determined that the testimonies that led to the arrests, in this case, were not valid, as they were obtained in the absence of reasonable suspicion and the vehicle was stopped without probable cause, as required under the Fourth Amendment. In 1996, the U.S. Supreme Court ruled in United States v. Armstrong that disparity in conviction rates is not unconstitutional in the absence of data that "similarly situated" defendants of another race were disparately prosecuted, overturning a 9th Circuit Court ruling that was based on "the presumption that people of all races commit all types of crimes – not with the premise that any type of crime is the exclusive province of any particular racial or ethnic group", waving away challenges based on the Fourth Amendment of the U.S. Constitution which guarantees the right to be safe from search and seizure without a warrant (which is to be issued "upon probable cause"), and the Fourteenth Amendment which requires that all citizens be treated equally under the law. To date, there have been no known cases in which any U.S. court dismissed a criminal prosecution because the defendant was targeted based on race. This Supreme Court decision doesn't prohibit government agencies from enacting policies prohibiting it in the field by agents and employees. The Supreme Court also decided the case of Whren v. United States in 1996. Michael Whren was arrested on felony drug charges after police officers observed his truck sitting at an intersection for a long period of time before he failed to use his turn signal to drive away, and the officers stopped his vehicle for the traffic violation. Upon approaching the vehicle the officers observed that Whren was in possession of crack cocaine. The Court determined the officers did not violate the Fourth Amendment through an unreasonable search and seizure and that the officers were permitted to stop the vehicle after it committed a traffic violation and the subsequent search of the vehicle was permitted regardless of the pretext of the officers. In June 2001 the Bureau of Justice Assistance, a component of the Office of Justice Programs of the United States Department of Justice, awarded a Northeastern research team a grant to create the web-based Racial Profiling Data Collection Resource Center. It now maintains a website designed to be a central clearinghouse for police agencies, legislators, community leaders, social scientists, legal researchers, and journalists to access