MANILA, Philippines — Sen. Erwin Tulfo on Wednesday filed grave oral defamation complaints against former Anakalusugan Rep. Mike Defensor, two of the alleged “18 ex-bodyguards” of former Ako Bicol Rep. Zaldy Co and their counsel, Atty. Levito Baligod, and two others for implicating him in the flood control scandal. Tulfo personally arrived at the Mandaluyong