You could consider obstruction of justice:
Obstruction may consist of any attempt to hinder the discovery,
apprehension, conviction or punishment of anyone who has committed a
crime. The acts by which justice is obstructed may include bribery,
murder, intimidation, and the use of physical force against witnesses,
law enforcement officers or court officials.
[Ohio State Bar Association]
Its definition from West's Encyclopedia of American Law, edition 2:
A criminal offense that involves interference, through words or
actions, with the proper operations of a court or officers of the
The integrity of the judicial system depends on the
participants' acting honestly and without fear of reprisals.
Threatening a judge, trying to bribe a witness, or encouraging the
destruction of evidence are examples of obstruction of justice.
Federal and state laws make it a crime to obstruct justice.
Common law jurisdictions other than the United States tend to use the wider offense of Perverting the course of justice
Perverting the course of justice is a criminal offence in England and
Wales. The offence is committed when a person prevents justice from
being served on him/herself or on another party.