NEW YORK — For years, the 1997 killing of a young woman found in a Long Island state park — her body dismembered, left unidentifiable beyond a tattoo of a peach — seemed destined to remain unsolved.

That all changed in 2011, when investigators discovered new skeletal fragments, along with the body of her 2-year-old daughter, while combing a beachfront strip near Gilgo Beach as part of what would become an infamous investigation into women murdered in the area.

This week, police arrested and charged a man with murdering the woman, since identified as Tanya Denise Jackson, according to two people familiar with the investigation.

Andrew Dykes, 66, is the father of the 2-year-old, Tatiana Marie Jackson, according to those people, who requested anonymity because they were not authorized to d

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