Dr. Margaret Mary Kilcoyne was certain she had recently made a medical discovery that was going to win her a Nobel prize. But even before Margaret could begin to celebrate, she would vanish. Margaret's brother Leo would claim that Margaret had been under a bunch of stress, but if she had her colleagues hadn't really noticed- stating her odd behavior in the days before she went missing as just Margaret being Margaret.

Did Margaret Kilcoyne have a mental breakdown and take her own life? Did she simply walk away from her current life and start over somewhere else? Or could she have been a victim of foul play?

It's a case that has left those in the small Nantucket town without any answers but with a whole bunch of theories.

What happened to Margaret Kilcoyne?

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SOURCES:

COLD CASE: The Disappearance of Margaret Kilcoyne, Nantucket's Greatest Unsolved Mystery - Nantucket Magazine (n-magazine.com) (this is an excellent write up on this case- major props to the author and most of today's source material came from this article).

Margaret Mary Kilcoyne – The Charley Project

Dr. Margaret Kilcoyne 1980 - Southcoast Murders & Mysteries (weebly.com)

PHOTO SOURCE:

Margaret Mary Kilcoyne – The Charley Project