Ten months after 13-year-old Abigail Williams and 14-year-old Liberty German were murdered while on a hike through a public trail system in northern Indiana, the person responsible for their deaths is still at-large. The teenagers’ bodies were found near a creek at the bottom of a hill, less than 24 hours after their disappearance.

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State, local and federal agencies continue to work to identify a man they say Liberty snapped a photo of with her smartphone. Investigators say the teenager also made a brief recording of the presumed killer’s voice ordering the girls “Down the hill.”

On Wednesday’s episode, Dr. Phil interviews the girls’ family members and speaks with Indiana State Police Superintendent Douglass Carter about the unsolved murders.

“Somebody talked to this killer yesterday,” says Carter, who is urging anyone who believes they may have had contact with the man to call authorities. Why does he say police haven’t publicly released the teenagers’ manner of death?

This episode airs Wednesday. Check here to find out where you can watch.

Anyone with information that might assist police in their investigation into the murders of Abigail Williams and Liberty German is asked to call the Delphi Tipline at (844) 459-5786.

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Indiana Teens’ Killer Still At-Large: ‘He Took Two Innocent Lives,’ Says One Victim’s Grandfather