R v Davis [2008] UKHL 36 is a decision of the United Kingdom House of Lords which considered the permissibility of allowing witnesses to give evidence anonymously. In 2002 two men were shot and killed at a party, allegedly by the defendant, Ian Davis. He was extradited from the United States and tried at the Central Criminal Court for two counts of murder in 2004. He was convicted by the jury and appealed. The decision of the House of Lords in June 2008 led to Parliament passing the Criminal Evidence (Witness Anonymity) Act 2008 a month later.