CNN article "Nigerian's online scam nets 19-year sentence" - See link below.
Young married Nigerian man sees the message of a lonely widow online.
He tells her he is a British engineer working in Lagos who lost his wife and kid in a car accident; sends photo of a middle aged white man. He writes that he loves her, he nurtures the relationship via email, they become engaged via email...
After a while, he calls her pretending to be a doctor, saying that the fiance got hit in a car accident, and asks for money for treatment.
She sends the money.
Later, he asks her to send money for a plane ticket to her country, saying that he wants to visit her.
Overall, he got $47,000 from her.

I was not aware that Nigeria had an Economic and Financial Crimes Commission, Nigeria's anti-corruption police (this is what the article says). Considering the number of online frauds coming from Nigeria, they must be quite busy...

Read the whole article at the link below.