March, 2011, MtGox sold by programmer (Ripple co-founder) Jed McCalib to to French developer and bitcoin enthusiast 26 year old Mark Karpeles.The exchange allegedly had already lost 80 000 bitcoins but this was not disclosed to the public.McCaleb also said that Mark Karpeles had rewritten the MtGox codebase back in 2011 after the sale was completed.
Although I knew that 80,000 BTC were already missing from Mt. Gox when Jed McCaleb sold it to Mark Karpèles — McCaleb suggesting to Karpèles “maybe you don’t really need to worry about it” — hackers had already cleaned out Mt. Gox while McCaleb owned it. He had sold Karpèles an insolvent exchange.
https://davidgerard.co.uk/blockchain/2017/09/17/kim-nilsson-of-wizsec-how-the-bitcoins-were-stolen-from-mt-gox/