Manila, April 18 -- Ramil Madriaga's waiver of his rights under bank secrecy laws may turn him into one of the most important witnesses if the impeachment case against Vice President Sara Duterte reaches the Senate, Deputy Speaker Paolo Ortega V of La Union said Saturday.

In a statement, Ortega, one of the endorsers of the 4th impeachment complaint, said Madriaga's willingness to open up his own bank accounts shifts him from being a witness with allegations to a witness inviting scrutiny of his own financial trail.

"Napaka-credible ng witness na walang itinatago. The fact na kaya at willing si Mr. Madriaga na mag-tell all at mag-open all, ibig sabihin ay kaya niyang patunayan ang lahat ng kanyang sinasabi. Kusa na siyang nagpapasilip n...