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The Independent UK
The Independent UK
National
Andrea Cavallier

The potential ‘Son of Sam’ killings that still haunt the NYPD

NYPD David Berkowitz Murder Chelsea Manhattan The New York Times New York Prison Smith College The Independent
On Halloween 1981, Ronald Sisman and Elizabeth Platzman were shot execution style at a Chelsea apartment (pictured in 2025) and their case is still unsolved 44 years later - (Andrea Cavallier/The Independent/IMDb)

Halloween night in New York City, 1981: a photographer and his young girlfriend are fatally shot, execution-style, in their Chelsea apartment. There is no forced entry, there are no obvious suspects and there is no clear motive.

For more than four decades, the chilling double-murder of lovebirds Ronald Sisman, 39, and Elizabeth Platzman, 20, has remained a mystery. Any leads in the case have long since turned ice cold.

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