The United States Secret Service is one of the most elite law enforcement organizations in the world. It has earned this reputation throughout more than 140 years of unparalleled service to the nation. As one of the oldest federal law enforcement agencies in the country, the Secret Service has dual missions that include investigations as well as protection. These are the unique characteristics that distinguish the Secret Service from other law enforcement organizations. During the course of their careers, special agents carry out assignments in both of these areas and must be available to be assigned to duty stations anywhere in the world.
Since its inception in 1865, the Secret Service has been involved in protecting the integrity of the nation's financial systems. Recent advances in technology have changed the nature of financial transactions throughout the world. Consequently, the Secret Service's investigative responsibilities have increased significantly. The Secret Service has jurisdiction in the United States for investigations involving the counterfeiting of U.S. and foreign obligations and securities. This authority has expanded to include the investigation of financial institution fraud, access device fraud, computer crimes, fraudulent government and commercial securities, fictitious financial instruments, telecommunications fraud, false identification and identity theft.
In the years since the Secret Service's protective mission was first mandated in 1901, the agency's jurisdiction has expanded over time and currently includes protection for the following:
The president, the vice president, (or other individuals next in order of succession to the Office of the President), the president-elect and vice president-elect
The immediate families of the above individuals
Former presidents, their spouses for their lifetimes, except when the spouse remarries.
Children of former presidents until age 16
Visiting heads of foreign states or governments and their spouses traveling with them, other distinguished foreign visitors to the United States, and official representatives of the United States performing special missions abroad
Major presidential and vice presidential candidates, and their spouses within 120 days of a general presidential election
Other individuals as designated per Executive Order of the President
National Special Security Events, when designated as such by the Secretary of the Department of Homeland Security
http://www.secretservice.gov/whoweare_sa.shtml
Which of these responsibilities applies to this crime? I would say money laundering, but SeSe was on the scene before Wint was even named as a suspect.