The Metropolitan Opera House in New York City is one of the most prestigious cultural institutions in the world. In the early 1980s, it was a beacon of elegance standing tall in a city overrun by crime and chaos. But one terrible summer night, that crime and chaos found its way inside the Met. A violinist named Helen Hagnes Mintiks went missing during a performance and was found murdered in an air shaft in the building the next day. InsideEdition.com's Sal Bono has more.