Senior NBI agent first to testify against Sara Duterte

MANILA, Philippines — A senior agent of  the  National Bureau of Investigation (NBI) took the witness stand on Tuesday as the impeachment trial against Vice President Sara Duterte entered its second day. John Mark Calilung was presented by private prosecutor Amando Virgil Ligutan in connection with Duterte’s alleged threat to kill President Ferdinand Marcos Jr., his wife  Liza and