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The Boston Globe

Metro

Death of Westborough woman, 19, was accidental, N.H. suspect claimed

DOVER, N.H. — A man charged with killing a University of New Hampshire student in ­October initially told investigators that someone else strangled her, then later said he accidentally killed her during a consensual sex act, according to documents unsealed Monday.

Seth Mazzaglia is charged with killing Elizabeth ‘‘Lizzi’’ Marriott, 19, of Westborough, Mass., during an attempted sexual assault on Oct. 9. Prosecutors say it was not consensual.

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