Police investigating the nerve agent poisoning of an ex-Russian spy were told he was not living in the area and they were "overreacting".
Sergei Skripal and his daughter Yulia were found slumped on a bench in Salisbury city centre after being exposed to Novichok in 2018.
Officers found out who they were by using Google to search Mr Skripal's name, the inquiry into the death of Dawn Sturgess was told.
An email from April 2021 from Wiltshire Police Inspector Gill Hughes said national security unit Special Branch had been “very dismissive” of the information provided about Mr Skripal’s poisoning by the force’s control room, the inquiry was told.