Nearly 58 years after he repeatedly hit 10-year-old Betty Lou Zukowski with a rock and dumped her in a in West Springfield river, Donald Mars pleaded guilty to manslaughter Thursday morning, Hampden DA Anthony Gulluni announced.

Nearly 58 years after he repeatedly hit 10-year-old Betty Lou Zukowski with a rock and dumped her in a in West Springfield river, Donald Mars pleaded guilty to manslaughter Thursday morning, Hampde…{ai:summary}<p>Donald Mars finally admits to killing Betty Lou Zukowski over 5 decades later, pleading guilty to manslaughter. #crime</p>

Sex offender pleads guilty to West Springfield killing of 10-year-old girl in 1966

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