DELPHI, Ind. (AP) - Indiana authorities are repeating their call for the public to keep passing on tips in the slayings of two teenage girls killed during a hiking trip , saying the next tip could help solve the crime.

Fourteen-year-old Liberty German and 13-year-old Abigail William vanished on Feb. 13, 2017, while hiking near their hometown of Delphi, about 60 miles (95 kilometers) northwest of Indianapolis.

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Their bodies were found the next day in a rugged, wooded area.

Carroll County Prosecutor Nicholas McLeland said Wednesday during a briefing on the crime's 2-year anniversary that the double-slaying remains under active investigation. He urged the public to keep providing authorities with tips.

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McLeland says some 38,000 tips have been received to date, but the next tip "could be the missing piece that ties everything together."