In this Dec. 17, 2015, file photo, Martin Shkreli, the former hedge fund manager under fire for buying a pharmaceutical company and ratcheting up the price of a life-saving drug, is escorted by law enforcement agents in New York, after being taken into custody following a securities probe. Pharmaceutical honcho Shkreli has been banished to solitary confinement amid allegations he was running his drug company from federal prison using a contraband smartphone, a person familiar with the matter told The Associated Press.
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