On October 14, 2023, 42-year-old John J. McCann was shot and killed during a confrontation in a wooded area along Knight Hollow Lane in Mosheim, Tennessee. The Greene County Sheriff’s Office responded to a call about a shooting at approximately 3:40 p.m.; deputies found McCann deceased with multiple gunshot wounds.

That day, 26-year-old Liam MacDonald-Gagnon of Johnson City and his girlfriend encountered McCann after earlier reports that McCann had been aggressively following their vehicle on Pates Hill Road and later blocked MacDonald-Gagnon’s vehicle on Knight Hollow Lane. MacDonald-Gagnon said McCann was verbally aggressive, that McCann drove toward him in a threatening manner, and that during an argument McCann reached toward his center console; MacDonald-Gagnon then fired what he believed were about twelve rounds with a .40-caliber pistol. The girlfriend told investigators she and McCann had broken up about two months earlier and that McCann had been harassing and stalking her, and an Order of Protection was reportedly in place against McCann.

MacDonald-Gagnon was arrested and charged with second-degree murder, but a Greene County grand jury did not return a true bill and the prosecution dropped the charge. If anyone has information about McCann, his movements that day, or the confrontation on Knight Hollow Lane, please share what is known.