The watchdog agency charged with overseeing the regulator of Fannie Mae, Freddie Mac and the Federal Home Loan Banks said it plans to remain “active on the law enforcement front.” In its semi-annual report to Congress issued this week, the Federal Housing Finance Agency’s Office of Inspector General gave a tally of its accomplishments for the six-month period ending March 31, noting that it issued 13 audit, evaluation survey and white paper reports, and participated in several criminal and civil investigations.