Police Warned About Nashville Bomber

The transcript details the events surrounding the Nashville Christmas Day explosion. It begins with a tip from the suspect's girlfriend in August 2019, reporting that her boyfriend was building bombs in an RV. Police responded to the tip but were unable to inspect the RV or contact the suspect. The report was subsequently forwarded to the FBI for further investigation.

Why were the police unable to reach the suspect?

What action did the police take after receiving the report?