HLN’s acclaimed podcast, "Down the Hill: The Delphi Murders," is back with an update on the case that has baffled the nation for nearly 6 years. An arrest has been made in connection with the murders of Liberty German and Abigail Williams. Teenage best friends who were brutally killed while on a hike in Rural Delphi, Indiana. But not before one of them recoded a short clip of someone walking toward them, and a snipped of audio in which that stranger tells the girls to go “Down the Hill.” Downloa