In a typical con, the perpetrator will spend weeks or even months building up a romantic relationship with a victim through e-mails, texts or phone calls, before eventually asking for money.
And many of the scammers aren't even in the United States.
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"In the process of going back and forth, a scammer is going to try to figure out what makes a person tick, what their vulnerable spots are," said Jenny Shearer, an FBI spokeswoman.
"Because a victim has legitimate feelings, they might be inclined to offer financial support for this person." For Best, it all started when she signed up for a free online dating site called mingle2.