Martin Shkreli, former CEO of Turing Pharmaceuticals, right, <a href="http://money.cnn.com/2016/02/04/news/companies/martin-shkreli-hearing/" target="_blank">invoked his Fifth Amendment right</a> against self-incrimination during a House Oversight and Government Reform Committee hearing in Washington on Thursday, February 4. Turing had raised the price of Daraprim, a drug used by AIDS and cancer patients, by 5,000%, from $13.50 to $750 a pill.