Alejano said his aim was to give Filipinos a chance to speak up against a powerful president.
The new peace talks start early next month and discuss the terms of a broader cease-fire.
Lascanas broke down in tears before the media when he revealed his story two weeks ago.
Here's what we know so far.
Marines found Kantner's body on Saturday evening in the militants' remote southern island stronghold of Sulu.
One woman died of a heart attack while at least 29 people were injured.
It is indicated in the Philippines' law to protect overseas Filipino workers
Pacquiao had said four days ago that he and Khan's management were in discussions for the fight.