Kenneth G. Koster, 45, of Knoxville, Tennessee, was found dead near a residence on Enix Lane in Caryville on the morning of Monday, September 8, 2014. The Campbell County Sheriff’s Department determined his death was a homicide. Investigators reported that Koster had willingly left with James Bradley Phillips and Monica Leigh-Ann Briggs the night before, and that he knew Briggs prior to that evening.

Koster’s body was discovered wrapped in plastic; a handgun, cleaning supplies, and a rifle were found nearby. His bloodied clothing and wallet, along with Briggs’s wallet, were later recovered from the pickup truck Briggs used to flee the scene. Monica Leigh-Ann Briggs was arrested and, after a trial lasting more than three days, was convicted by a jury of premeditated first-degree murder and second-degree murder; the court sentenced her to life in prison to run concurrently with an 18-year term for the second-degree conviction. Koster’s mother, Mary Jane Koster, remembered him as fun-loving, honest and hardworking and noted he had served as a Marine.

Did anyone in the Caryville area have contact with Koster, Phillips or Briggs in the days before September 8, 2014?