If the matter is referred to the Department of Justice for criminal prosecution, the Inspector General may suspend any investigation under this subsection pending the outcome of the criminal prosecution. The Inspector General shall notify the head of the executive agency that awarded the contract, grant, or cooperative agreement of an indictment, information, or criminal complaint against the recipient of a contract, grant, or cooperative agreement; any subgrantee or subcontractor of the recipient; or any agent of the recipient or of a subgrantee or subcontractor. If the criminal investigation results in a decision not to prosecute, the Inspector General shall promptly determine whether to resume any investigation that was suspended pursuant to this paragraph. In the event that an Inspector General does not resume an investigation, the Inspector General shall document the rationale for the decision.