Indiana State Police release video and new sketch of suspect in 2017 murders of two girls during a hiking trip

DELPHI, Indiana: Indiana State Police have released video of the suspect in the 2017 killings of two teenage girls that shows the man walking on an abandoned railroad bridge the teens visited before they were slain.

State Police on Monday also released a new sketch and audio of the man suspected of killing 14-year-old Liberty German and 13-year-old Abigail Williams. The video and the audio came from German's cellphone.

State Police Superintendent Doug Carter said during a news conference in the girls' northern Indiana hometown of Delphi that investigators believe the man is between the ages of 18 and 40 and either lives or lived in Delphi or works in the area.

Carter vowed that police will solve the case and addressed the suspect during his briefing, saying, "We believe you are hiding in plain sight."

No arrest warrants have been issued and no arrests have been made in the killings of the teens, Sgt. Kim Riley said.

The teenagers' bodies were found in a rugged, wooded area one day after they went hiking near their hometown of Delphi, a community of about 3,000 people roughly 60 miles (95 kilometers) northwest of Indianapolis.

Within days of the killings, investigators released two grainy photos of a suspect walking on the abandoned railroad bridge the girls had visited, and an audio recording of a man believed to be the suspect saying "down the hill."

That evidence came from German's cellphone, and police have hailed the girl as a hero for recording potentially crucial evidence.

Investigators have reviewed thousands of leads looking for the man. Police also have released a composite sketch from eyewitnesses who believe they saw the man in Delphi.