/r$'s story reminds me of one told to me by my wife's cousin's husband,
a New York City cop.
He (Mike) was on duty for a parade in the Bronx a few years ago. The
parade had something to do with some big holiday of one of the Carribean
islands. During the parade a spectator collapsed, apparently of a heart
attack. People yelled for a doctor. A guy pushed through the crowd saying
he was a doctor. He pulled out a large knife and cut open the unconcious
guy's chest, saying he was going to give heart massage. When Mike showed
up, the guy with the knife took off. The police think he was trying to
steal the heart for a voodoo ceremony.