Criminal law (2022): Crimes against justice: Compounding a felony + Malicious mischief + Malfeasance in office + Miscarriage of justice

Compounding a felony was an offense under the common law of England and was classified as a misdemeanor. It consisted of a prosecutor or victim of an offense accepting anything of value under an agreement not to prosecute, or to hamper the prosecution of, a felony. To "compound", in this context, means to come to a settlement or agreement. It is not compounding for the victim to accept an offer to return stolen property, or to make restitution, as long as there is no agreement not to prosecute.

Under the common law, compounding a felony was punishable as a misdemeanor. Many states have enacted statutes that punish the offense as a felony. Compounding a misdemeanor is not a crime. However, an agreement not to prosecute a misdemeanor is unenforceable as being contrary to public policy.

Compounding has been abolished in England and Wales, in Northern Ireland, in the Republic of Ireland, and in New South Wales. In each of these cases, it has been replaced by a statutory offense.

Mischief or malicious mischief is the name for a criminal offense that is defined differently in different legal jurisdictions. While the wrongful acts will often involve what is popularly described as vandalism, there can be a legal differentiation between vandalism and mischief. The etymology of the word comes from Old French meschief, which means "misfortune", from meschever, "to end badly".

Malfeasance in office is often grounds for a just cause removal of an elected official by statute or recall election. Malfeasance in office contrasts with "misfeasance in office", which is the commission of a lawful act, done in an official capacity, that improperly causes harm; and "nonfeasance in office," which is the failure to perform an official duty.

An exact definition of malfeasance in office is difficult: many highly regarded secondary sources (such as books and commentaries) compete over its established elements based on reported cases. This confusion has arisen from the courts where no single consensus definition has arisen from the relatively few reported appeal-level cases involving malfeasance in office.

A miscarriage of justice occurs when a grossly unfair outcome occurs in a criminal or civil proceeding, such as the conviction and punishment of a person for a crime they did not commit. Miscarriages are also known as wrongful convictions. Innocent people have sometimes ended up in prison for years before their conviction has eventually been overturned. They may be exonerated if new evidence comes to light or it is determined that the police or prosecutor committed some kind of misconduct at the original trial. In some jurisdictions this leads to the payment of compensation.