In the aftermath, The Tennessee Bureau of Investigation said Warner was “not on our radar” prior to the bombing. But a Metro Nashville Police Department report from August 2019 shows that local and federal authorities were aware of alleged threats he had made…

On Aug. 21, 2019, the girlfriend told Nashville police that Warner “was building bombs in the RV trailer at his residence,” the MNPD report states. Nashville police then forwarded the information to the FBI…

Police then went to Warner’s home, but he didn’t answer the door after they knocked several times.

Officers saw his RV behind the house, but the vehicle was fenced off and police were unable to see inside of it, the report said. While there, police noted that there were “several security cameras and wires attached to a alarm sign on the front door.”