NEW YORK — A notorious 1979 missing-child case is headed to trial a third time after New York prosecutors vowed Tuesday to retry the man whose murder conviction was recently overturned in the disappearance of 6-year-old Etan Patz.

In a case that has long been gnarled by time and uncertainty, a new set of prosecutors now will need to bring back witnesses, elicit memories and try to persuade another jury that Pedro Hernandez lured and killed the boy as he walked to his school bus stop in New York City.

“After thorough review, the district attorney has determined that the available, admissible evidence supports prosecuting” Hernandez on murder and kidnapping charges, Manhattan Assistant District Attorney Sarah Marquez wrote, adding that prosecutors “are prepared to proceed.”

Hernandez’s la

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