Of course she was being overly dramatic there, but the police had already told her that essentially they didn't care and she was trying to get their attention so I think it's fair enough that she went a bit over the top there, no?! Wouldn't you when you've been robbed and the police tells you to go away?
10 officers seems a bit much, too. But from the information they were given it was probably hard to tell if this was just a small-scale petty criminal or a bit rink of organised crime, so better to be on the safe side. There might even be regulations?
But the whole exchanging tickets for cash situation already smells like scam to me, and I would NEVER do that, especially in NY. Worse, I'd be scared to be murdered, not just given fake tickets! I've bought secondary market tickets before (not for bway though, concerts on occasion and basketball recently & pretty much always around face value), but never via craigslist. I've only ever used stubhub, who is giving a guarantee your tickets are real. I've also recently learned how that works and makes me more confident in using those sites. (