THE National Bureau of Investigation (NBI) has issued a subpoena against former Presidential Commission on Good Governance (PCGG) commissioner Ruben Carranza over his alleged libelous social media posts against incoming National Security Adviser Clarita Carlos.The NBI said Carlos has requested for the conduct of an investigation on social media posts of five personalities against her.It said among those that they are investigating was the post of Carranza on his Twitter account on March 2, where he said, “She is a stupid person’s idea of a smart person.”Carranza made the post in response to another tweet about Carlos.He said he worked with her when she served as the president of the National Defense College.The NBI said they are still studying if they will issue subpoena to the other individuals. (SunStar Philippines)