MANILA - Senator Antonio Trillanes IV asserted Saturday that if elected president, the word of Davao City Mayor Rodrigo Duterte cannot be trusted, given the latter's alleged habit of changing his statements when cornered by facts.

In an interview on radio dzMM, Trillanes pointed out that Duterte has contradicted himself several times over his alleged undeclared wealth.

Trillanes on Wednesday accused the leading presidential bet of having a bank account supposedly containing over P200 million undeclared in his Statement of Assets, Liabilities and Net worth (SALN).

Duterte's camp initially denied that he had an account at the BPI branch on Julia Vargas Avenue in Pasig City, with daughter Sara.

But as proof that the joint account exists surfaced on social media, Duterte himself admitted that he has several accounts with BPI.

The mayor, however, insisted that two of these accounts only contain P50,000 and P17,000 each.

TIMELINE: Duterte camp denies, admits BPI account

Duterte on Friday again changed his statement and admitted having around P200 million in bank deposits.

He told reporters that: "There is money there in that account, a little lesser than P200 million."

Duterte was also cryptic when asked about seven transactions amounting to P193.71 million which supposedly entered his accounts on March 28, 2014, his 69th birthday.

"Ibig sabihin eh di mayroon akong maraming kaibigan na mayaman... Wala na, ginastos ko na. Nag-happy-happy ako," he said.

Referring to these statements, Trillanes said that Duterte has changed his defense four times in just less than a week.

"Ilang bago na niya ito ng kwento. Sabi niya, ginawa ko lang daw iyung account na iyun. Tapos noong nabisto, umamin; sabi niya single account daw iyun, hindi joint account," remarked Trillanes, who is running for vice president.

"Tapos noong nabisto na naman base doon sa deposit slip, umamin siya, sabi niya P50,000 lang daw ang pera niya. Tapos ngayon, nagpapauna na siya, mayroon daw siyang P200 million, hindi P211 million."

Trillanes added that Duterte's supposed undeclared funds are proof that his claim to leading a simple lifestyle is false.

"Ngayon, sinasabi niya na may milyun-milyon siya. Doon pa lang mismo, huli ka na. Kumbaga, hindi totoo iyung drama mo na ikaw ay mahirap at ikaw ay natutulog sa kulambo," he said.

The senator added that Duterte's supposed inclination towards fibbing will not make him a good president.

"Imagine mo kapag president iyan, hindi mo mapanghahawakan ang unang salita. Kapag naipit ka, kambyo; kapag naipit ka ulit, kambyo -- puro ganoon," he said.

Trillanes has further alleged that aside from Duterte's accounts at the BPI Julia Vargas branch, the 71-year-old mayor also has accounts dealing with millions of pesos at the BPI Edsa Greenhills branch and Banco de Oro Unibank-1 in Davao City.

He said these accounts received P2.407 billion in total deposits, from 2006 to 2015.

Duterte only receives a monthly pay of P78,946 as mayor, under the government salary standardization law. He reported only a net worth of some P21.971 million in his 2014 SALN.

Duterte has agreed to disclose his account at the BPI-Julia Vargas branch on Monday to prove that he is not keeping undeclared wealth.

An official who fails to declare an asset may be dismissed from government service.

Trillanes has vowed to impeach Rodrigo Duterte right away if the Davao City mayor wins in the May 9 presidential elections.

READ: Duterte to shut down Congress if threatened with impeachment