Martin Shkreli, who drew national scorn for hiking the cost of a life-saving drug 4,000 percent overnight, has been arrested, according to multiple reports early Thursday.The 32-year-old founder and CEO of Turing Pharmaceutical made headlines in September for raising the price of Daraprim, often used to treat HIV and AIDS patients, from $13.50 per pill to $750 per pill after buying the rights to the drug.His arrest is reportedly not related to that price increase.Shkreli is accused of illegally taking stock from a biotechnology firm he launched in 2011 called Retrophin Inc., Bloomberg reported, and using it to pay off...