This is a submission to the House of Lords in response to an appeal by the Director of the Serious Fraud Office from the independent human rights and law reform organisation, JUSTICE, which is the British section of the International Commission of Jurists. The submission addresses the domestic legal principles by which the legality of a prosecutor's decision to halt a criminal investigation in response to a threat should be assessed, and the relevant international obligations at issue, the OECD Anti-Bribery Convention.