LOUISVILLE, Ky. (WDRB) - The grandparents of one of the two teenage girls murdered in Delphi, Indiana in February say they still believe police will find their killer.

Fourteen-year-old Liberty German and 13-year-old Abigail Williams of Delphi went missing on Feb. 13 along a trail near Delphi, about 60 miles northwest of Indianapolis. Their bodies were found the next day in a creek in a nearby wooded area.

More than two months later, German's grandparents, Mike and Becky Patty, say they still have faith police will arrest whoever killed the Delphi teenagers. 

Authorities have released a grainy cell phone image -- taken by Liberty -- of the main suspect in the case. They also released recorded audio of three words -- "down the hill" -- spoken by the suspect.

To hear a recorded loop of the audio of the suspect, CLICK HERE.

The police tip line for the case is 844-459-5786. Tips can also be reported by emailing Abbyandlibbytip@cacoshrf.com.

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