According to CoinDesk, Mark Karpeles, former CEO of Mt. Gox, an early Bitcoin exchange, had to deal with a class action lawsuit filed by a former user in Philadelphia. According to a Reuters report on Monday, district judge Robert Kelly rejected Karpeles' request to dismiss the class action and accused Karpeles of concealing the issue of the exchange from his users. A court document on the ruling showed that the lawsuit was initiated by Gregory Pearce, a former client of Mt. Gox, on his behalf and others affected by the collapse of the exchange.