NBC doesn’t say anything about him being a US Marshall, maybe he isn’t.
https://www.nbcnews.com/news/us-news/man-gun-knife-fatally-shot-security-nashville-federal-courthouse-polic-rcna602348
The man was from out of state. Investigators didn’t immediately know why he was at the courthouse, and a search of his car found “nothing threatening,” Aaron said.
ABC and Fox also do not identify the man as a US Marshall.
https://www.fox10tv.com/2026/10/08/armed-man-shot-killed-by-security-federal-courthouse-nashville-police-say/
The suspect’s identity has not been released. Police did say the man is in his 40s and is from out of state but “has ties to Nashville.” They did not elaborate on the exact connection.
Officers and police K-9s searched the suspect’s car and found nothing threatening.