Luistro: Trillanes will no longer be presented as witness. MANILA, Philippines — Lead public prosecutor and Batangas Rep. Gerville Luistro has announced that former Sen. Antonio Trillanes IV will no longer be presented as witness by the prosecution panel for Vice President Sara Duterte’s impeachment trial. During the trial on Thursday, Luistro informed the Senate impeachment court that they have finally decided to refrain from.