Corruptly Obstructing Administration of Justice / 18 U.S.C. Sec. 1503(a) is a federal crime that occurs when a person corruptly attempts to influence, obstruct, or impede the due administration of justice. This crime is a felony punishable by up to 20 years in prison. The statute outlines four different types of obstruction: 1) corruptly endeavoring to influence, obstruct, or impede the due administration of justice; 2) threatening or corruptly influencing or attempting to influence a juror, witness, or court officer; 3) attempting to evade or prevent the attendance of a witness or the production of evidence in a court of justice; and 4) influencing or attempting to influence a judge or other person in a civil or criminal matter. Under this statute, it is illegal to engage in conduct that is meant to influence, obstruct, or impede the due administration of justice. Examples of such conduct can include bribery, tampering with evidence, perjury, witness tampering, and intimidating or harassing a juror or witness.