She was singled out because she was going after corporate fraud. The following example may not be about mortgages, but well illustrates a pattern of favoritism to corporations over "little people"
http://en.wikipedia.org/wiki/Carol_LamHealthcare fraud
Lam was an expert in prosecuting healthcare fraud, having authored a 954-page textbook on the subject.<11> As U.S. Attorney, Lam took an interest in the case of San Diego's Alvarado Hospital Medical Center, which was owned by Tenet Healthcare Corporation, the nation's second-largest hospital chain.<12> In 2002, government agents raided the hospital. In June 2003, the hospital's chief executive, Barry Weinbaum, was indicted on one count of conspiring to violate the federal anti-kickback statute and seven counts of offering and paying illegal remuneration. The hospital and a Tenet unit were indicted a month later.<13> On February 17, 2005, a mistrial was declared when the jury failed to reach a verdict. Lam personally prosecuted the case in a second trial; after seven months in the courtroom and a record of four months of jury deliberation, the judge declared another mistrial on April 4, 2006.<14>
Tenet settled. Denying that it paid kickbacks to doctors for referrals of patients to Alvarado, Tenet paid $21 million to the government, agreed to shut down Alvarado Hospital<15> and admitted that the case has led to "significant reforms" at hospitals around the country and that the company had been "distressed" to learn of "excessive payments" to some doctors.<16>
Lots more at Wikipedia as well as Google. Now we're in the middle of a Health Care debate, but it seems the gov made out okay in this case, they got $21M in fines, and now Health Insurance has its lobbyists out in force.
What about the nickel-and-diming that occurred over years before that by Medical-Insurance-hospital industry against "consumers". Was there justice for many little people that overpaid for years in the 21M fine?