Conspirator's Liability For Substantive Count refers to a legal concept which states that a person involved in a conspiracy can be held liable for a substantive count even if that person did not personally commit the underlying substantive offense. This liability is based on the principle of vicarious liability, where one person can be held responsible for the actions of another. There are two types of conspirator's liability: direct and indirect. In the case of direct liability, the conspirator is held liable for the substantive offense because they took part in the planning and execution of the offense, while in the case of indirect liability, the conspirator is held liable for the substantive offense because they knowingly aided and abetted the commission of the offense.