A former U.S. business executive, who abruptly raised the price of a life-saving drug by more than 5,000 percent, refused to answer questions when he appeared before Congress on Thursday.

Martin Shkreli’s appearance before the House Committee on Oversight and Government Reform was a chance for lawmakers to sound off on the case, which drew widespread criticism.

But the 32-year-old, who received a subpoena to appear before the hearing, said he was exercising his Fifth Amendment right against incriminating himself.

While he didn’t speak at the hearing, he took to Twitter to criticize the lawmakers who were questioning him.

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Source : VOANews.Com