Samuel Dennis McDonough Jr.

Samuel Dennis McDonough, Major, United States Air Force (Ret.), passed away on June 5, 2026, at the age of 93.

Born on October 7, 1932, in Miami, Florida, Samuel lived a life defined by service, perseverance, curiosity, and quiet strength. He proudly served his country in the United States Air Force during the Korean and Vietnam Wars, rising through the ranks from Captain to Major. Following his military service, he built a distinguished career as an economist for the federal government. In his later years, he pursued a lifelong passion for research and writing, publishing true crime works under the name S.D.M. Sleuth.

Samuel was an exceptionally intelligent, calm natured, and kind man with a deep appreciation for science, history, nature, and the mysteries of the universe. He enjoyed nature programs, documentaries about space, and was always eager to learn something new. While grounded in science and reason, he remained curious about life’s larger questions and the possibilities that might lie beyond this world.

He had a warm sense of humor and enjoyed classic comedies and late-night talk shows. He was a devoted fan of Miami sports teams and enjoyed following football and baseball throughout his life. One of his favorite pleasures was putting on a pair of headphones, closing his eyes, and getting lost in the music he loved.

Samuel was a stable and dependable presence for those around him a devoted provider who worked hard for his family. Though naturally reserved, he valued connection and cherished opportunities to share stories from his life. His son fondly remembers sitting with him as he reflected on old memories, his right foot tapping gently from his recliner as he revisited the people, places, and experiences that shaped him.

Throughout his life, Samuel was fortunate to be loved by many people and to form lasting friendships. During the nearly ten years he spent at his final residence, he developed many meaningful friendships that brought him companionship and joy. Among those friendships, none was more cherished than his friendship with Paul. The two spent countless hours together talking about life, current events, and, as Paul would affectionately say, “solving the world’s problems.” Their conversations were a source of enjoyment and connection for both men and reflected Samuel’s lifelong love of ideas, stories, and thoughtful conversation.

He was preceded in death by his beloved wife, Elizabeth McDonough.

Samuel is survived by his children, James McDonough, John McDonough, Donna Kenny, and Tanja Hall; his brother, Ray McDonough; sister, Lucy McDonough; grandson, Nathan McDonough; granddaughter, Sandra Fre, daughter-in-law, Crista McDonough; along with extended family, dear friends, and all those whose lives were enriched by knowing him.

Samuel did not spend his life following a carefully scripted plan. Instead, he met life as it came, persevering through challenges, embracing opportunities, and moving forward with determination. He leaves behind a legacy of service, curiosity, intelligence, kindness, resilience, humor, and friendship. His life was well lived, and his memory will continue to live on in the hearts of those who knew and loved him.