U.S.C. Title 18, Chapter 19 prohibits conspiracies to defraud the United States, conspiracies to impede or injure an officer, and conspiracies to commit violent crimes. However, conspiracy is prohibited in several other federal statutes. It is important to note that an actual crime is not necessary to prosecute a conspiracy case – only the stated intent to break the law. This means that even if the ultimate crime was not committed, the conspirators can be prosecuted under federal law. However, most states have laws that prevent conspiracy charges to be pressed if no actions were taken to actually carry out the conspiracy. This prevents people from effectively being prosecuted for having thoughts of breaking the law. While this caveat does prevent some conspiracy cases from going to court, it does not reduce the severity of a conspiracy claim. In many cases, conspiracy to commit a crime such as murder is regarded as a crime as severe as murder itself.

Conspiracy crimes can include conspiracy to engage in criminal activity such as money laundering, conspiracy to violate federal laws, or conspiracy to manufacture drugs or weapons. The federal maximum penalty for conspiracy is five years in prison; however, this may be compounded by other state and federal violations. Depending on the nature of the conspiracy, it may be prosecuted by different entities including the FBI, Department of Justice, or state and local law agencies.