Chris McMullin is a seasoned law enforcement officer and detective who has dedicated his career to solving notorious murder and missing person cases in Bensalem, PA, Philadelphia, and across the country. His first book, '3 Decades Cold,' published by Genius Book Publishing, narrates his life, career, and the challenging cases he has cracked. A prominent member of the Vidoq Society, McMullin continues his work in law enforcement and leads the nonprofit organization, Cold Case Initiative, striving to bring justice to cold cases.