The Gray Line, The Story Behind The Blue Line, is a law enforcement podcast discussing numerous topics. The podcast has four hosts. Benny Cruz, a retired San Diego Sheriff's Detective; David Contreras, a retired San Diego Police Detective Sergeant; Sean Murphy, a retired San Diego Police Lieutenant; and Gonzalo "Chalo" Gerardo, retired Calexico Police Chief. The podcast goes live every Tuesday at 6 pm (PST). All the episodes start with an introductory video and song. The panel interviews many individuals, such as Prison Wardens, Alex Marentes, Buggs of Borderland Beat, Parole Agents, Hector Bravo of That Guard Podcast, Los Angeles County Sheriff Alex Villanueva, DEA agents, former LAPD Rampart Officer Ruben Palomares, and Jay Flores, one of the Chicago Twins that brought down Joaquin "El Chapo" Guzman from the Sinaloa Cartel, and many other guests. You can watch the video podcast on YouTube by going to their YouTube Channel.

On October 13, 2014, 31-year-old Elizabeth Sullivan went missing from San Diego, California. Two years later, her body was found in a freezer in the San Diego Bay. Her husband, a former U.S. Navy sailor, was subsequently arrested, found guilty, and sentenced to prison. The case caught national attention, and the Sullivan case was featured on Dateline NBC. The Dateline episode was titled "Secrets By The Bay." Detective Collier will discuss the investigation and some of the case details.