It's definitely a scammer. I saw a story on the news about this. They tried it on a cop and he recorded everything. The caller kept repeating that he would get arrested if he didn't verify all of his information with him and send him money. Still laughing at that one.
They called saying I would be arrested if I didn't return the call. It was a robot. I called it back and a female answered but I couldn't tell what she said. I was hoping to catch the name of a business or something. Seems like a prank to me.