John D. Marko

John D. Marko is a true crime podcaster and researcher with a focus on unsolved murders and conspiracies. He has been involved in various true crime projects and has written articles on the topic. Marko is known for his meticulous research and attention to detail. He has a strong background in law enforcement and has worked as a police officer in the past. Marko is also a skilled investigator and has helped solve several cold cases. He is a regular contributor to various true crime podcasts and has appeared on several TV shows. Marko is a native of Texas and currently resides in the Dallas area.