Roane County authorities took 36-year-old Samuel Chancellor Brock Johnson of Crossville into custody following a recent incident. Officers say Johnson stopped at a home on Riggs Chapel Road and identified himself as a U.S. Marshal. Johnson allegedly asked a woman if there was any men in the home. After learning there was not, he went inside and into a bedroom where he located a rifle. The female and her son in the residence fled the scene and ran into a wooded area. Johnson reportedly pointed the weapon at several who arrived after a call for help was made. Johnson was later arrested and faces charges including but not limited to aggravated assault, aggravated burglary, criminal impersonation of a law officer, unlawful possession of a firearm and possession of a firearm during the commission of a felony.