Testimony of an addict-informant under grant of immunity or reduced criminal liability is a type of legal testimony given by a person who has been granted immunity from prosecution or a lesser penalty in exchange for providing information and/or testimony about a crime or criminal activity. This type of testimony is typically used in criminal cases and is often given by someone who has knowledge of the crime or criminal activity. There are two main types of this testimony: 1. Testimony under grant of immunity: This is testimony given by an informant who has been granted complete immunity from prosecution in exchange for providing information and/or testimony about a crime or criminal activity. 2. Testimony under reduced criminal liability: This is testimony given by an informant who has been granted reduced criminal liability in exchange for providing information and/or testimony about a crime or criminal activity. This type of testimony typically involves a lesser penalty or reduced sentence in exchange for providing information and/or testimony about the crime or criminal activity.