Carter said the investigation has shifted in direction. They now believe they're looking for someone who lives in Delphi or used to live in the city. He also said investigators were looking for the owner of a vehicle found abandoned near the scene.
Carter, who didn't take questions after revealing the new information, also showed additional video taken from Libby German's phone.
The teens were reported missing on Feb. 13, 2017. Their bodies were discovered the next day. On Feb. 15, 2017, Indiana State Police and the Carroll County Sheriff's Department released a photo of a man who was reportedly walking on the trail around the time the girls disappeared. A week later, investigators released an audio recording of a man's voice saying "down the hill." The photo and audio came from Libby German's phone, police said.