identity she's stolen. >> reporter: and the federal government almost bought it, telling the real candidaally you. >> it's outrageous, not only am i a victim, but i'm also having to defend myself against the people who are supposed to defend me and protect my rights. >> reporter: eventually, police caught the suspect. her real name is benita gonzalez. in the u.s. illegally now charged with aggravated identity theft. still unclear how she stole the information. >> if you're not looking for it, it's almost impossible to detect it. >> reporter: todd fineman is a security expert. >> once a thief has this information, how does it get this far where they can buy a house? basically assume your life and no one catches it? >> once an identity thief has our social security number and name, they can go out and get addresses, dates of birth, and then with that information take out a driver's license, a credit card, open up a bank account and that's really when the worst type of identity fraud starts to occur. >> reporter: he says it can go on for years undetected because most of us don't check our cr