The question now that the family has revealed names of those involved, can the committee go after them? Of course this will go on trial and will be dragging the names of those involved. But I think by now, it's very obvious that with the life style of this two engineers, they should be guilty of misuse or misappropriation of public money or property and they should be put to jail by now.
But I don't know how the justice system in the Philippines. If those high officials involved themselves, then maybe they know that they can still get away with it despite the overwhelming proof like the speaker of the house.