"more than 100 people were using the same Social Security number"

This article is a great discussion of the issue of Social Security Identity Theft and how it can tie into Financial and Character/Criminal ID theft, in multiple states and countries and why an attorney may be very useful:

Identity theft opens door to woes

South Florida teens among latest victims

The investigation began in 2007, when detectives discovered that more than 100 people were using the same Social Security number as a fugitive they were tracking. The number actually belonged to the Chicago teen. Ultimately, 27 workers across Florida were convicted in the case.

http://www.sun-sentinel.com/news/local/breakingnews/fl-identity-theft-20100509,0,4948712.story?page=1