A nearly 12-year-era in law enforcement comes to an end today in New Orleans. It is U.S. Attorney Jim Letten's last day in that capacity.

Letten announced his resignation last week.  Scandal shook his office when Letten disclosed that not just one, but two of his senior and most-trusted prosecutors were trying to use the anonymity of the Internet to comment publicly on active cases.

Letten says his trust in First Assistant U.S. Attorney Jan Mann and senior prosecutor Sal Perricone may have been what ended his career, but he also said that's just part of who he is.

"Have I always been the vulnerable sort because I like to default to trust? Maybe so, but that's what I'm not going to change," Letten said in an interview with WWL-TV.  "I am inclined to trust you, whoever you are, if I get to work with you, unless and until you prove me wrong."

As U.S. Attorney, Letten oversaw the successful prosecution of white collar criminals in New Orleans, bad cops, people attempting to defraud Katrina, and of course, numerous crooked politicians, either convicted by a jury or admitting to misdeeds while in office.

The Department of Justice has appointed veteran prosecutor Dana Boente to act as interim U.S. Attorney until President Barack Obama appoints a replacement.  As the First Assistant U.S. Attorney in Alexandria, Virginia, Boente led the prosecution of convicted former Congressman Bill Jefferson.