Martin Shkreli is an American entrepreneur, pharmaceutical executive, and stock-market analyst, who is currently serving his sentence for securities fraud. He co-founded the hedge fund 'MSMB Capital Management,' the biotechnology firm 'Retrophin,' and 'Turing Pharmaceuticals.' Shkreli has also served as the CEO of 'Retrophin' and 'Turing.' He was labeled by the media as the "most hated man in America" after he committed transaction fraud while serving at 'Retrophin.' He was heavily criticized for raising the price of the drug ‘Daraprim,’ manufactured by 'Turing.' Shkreli has also gained media attention for his aggressive social-media posts. His 'Twitter' account was disabled because of his objectionable posts.