In the early hours of April 25, 1986, someone killed a clerk at a 7-Eleven store in Layton. For the last 4 decades, detectives and amateur sleuths have tried to piece the mystery together: who killed Carla Maxwell?  40 years later, police have named a new person of interest in the murder case... and it could potentially bring about a conclusion and some answers about what really happened. Executive producer and host of the KSL Podcast "Cold", Dave Cawley, joins the program and breaks down this case.