There are many federal crimes. Some federal crimes involve narcotics, bank robbery, fraudulent activity that affects interstate commerce, wire fraud, mail fraud or tax fraud, any crime in which the United States is defrauded, guns, environmental crimes, and civil rights violations. Some crimes may violate both state and federal laws, such as bank robbery. In these cases, the local U.S. Attorney's Office works closely with state and local law enforcement officials to determine whether a case will be brought in federal or state court.