Verkkoinvestigators are searching for the killer using their biggest clue: A recording of his voice from one of the victims' phones ordering the girls down the hill. Verkkoinvestigators are searching for the killer using their biggest clue: A recording of his voice from one of the victims' phones ordering the girls down the. Verkkorichard allen, the man charged in the 2017 killings of two teenage girls in delphi, indiana, confessed to the crime during a phone call with his wife. Verkkoinvestigators are searching for the killer using their biggest clue: A recording of his voice from one of the victims' phones ordering the girls down the hill. Verkkoinvestigators are searching for the killer using their biggest clue: A recording of his voice from one of the victims' phones ordering the girls down the hill.