NOT even the threat of a human rights case by an international group can shut Davao City Mayor Rodrigo Duterte up, as he said Sunday that the 1,000 persons summarily executed since 1990 as claimed by the Human Rights Watch (HRW) will reach 100,000 if he ever becomes the country's president.

"Pag by chance that God will place me there, magbantay kayo, kay ang 1,000 na ito maging 100,000. Diyan mo makita tataba yung isda diyan sa Manila Bay, diyan ko kayo itapon," Duterte said, as he challenged the HRW to go ahead and file whatever case it is threatening to file, confident that it will not find anything anyway.

"Gusto ko sila pumunta didto. File a case directly in court. Just execute an affidavit, then I'll call when it's my time for cross examination. Mamatay na lang sila, I will cross examine you until Kingdom come," Duterte said in his weekly television show.

"It will give me hours just to put you in shame," he added.

The mayor also challenged the HRW to prove its case lest meet the same fate of the 1,000 summarily executed.

"If I catch you lying, I will really pin you down. Siguraduhin mo lang na sigurado ka, baka ipapatay din kita for dragging me into something which I did not do," Duterte said.