This research aims to determine the justice collaborator and crown witnesses' efficiency in uncovering criminal corruption cases. Furthermore, this article uses normative methods, library data sources, and relevant regulatory legal documents. The findings in this research are that using crown witnesses in the judicial process is common, but this condition does not mean that the public prosecutor can present crown witnesses in court. The use of crown witnesses with a mechanism (splitting) in the evidentiary process in court is contrary to the principle of non-self-discrimination, which is implicitly partially reflected in several articles, namely Article 66 of the Criminal Procedure Code, which states that there is no burden of proof for the defendant (the burden of proof is the responsibility of the public prosecutor). Crown witnesses are also an essential tool in fighting organized crime in cases of criminal acts of corruption. As an insider who is part of the environment where the information he leaked, he understands very well what and how the crime method is, which has been neatly wrapped up and kept secret from the public and law enforcement.
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