A former Deutsche Bank employee is at the center of a lawsuit brought by the government over the sale of more than $1 billion of non-agency MBS. It’s rare when the government focuses on an individual for mortgage fraud, but the Department of Justice said the bank’s former head of subprime trading allegedly defrauded investors out of hundreds of millions of dollars. The civil complaint was filed in Brooklyn’s federal court against Paul Mangione for knowingly selling bad subprime mortgages financed during the crisis and misleading investors about loan quality. The complaint alleges that he engaged in fraudulent schemes involving the origination practices of Deutsche Bank’s subsidiary, DB Home Lending LLC, which originated the bulk of the loans. The securities were sold...