[BBC] The first police on the scene of the poisoning of the former Russian spy Sergei Skripal realised the seriousness of the case after Googling his name.Mr Skripal and his daughter Yulia were targeted with the nerve agent Novichok on 4 March 2018 in Salisbury.
Sgt Tracey Holloway said after finding his name online they realised "it could be something bigger".
A church service, ahead of the first anniversary of the attack, is due to take place later.
St Thomas's Church, in the city, will remember the victims and offer thanks to the community.
TEST SAMPLES
Mr Skripal's house and 11 other potentially infected sites were ruled safe on Friday.
The operation included taking thousands of test samples from across Salisbury and nearby Amesbury, where Dawn Sturgess, 44, was fatally poisoned in July.
Britain has accused Russia of carrying out the poisoning of the Skripals.
Russia has also been blamed for the death of Ms Sturgess and the poisoning of Mr Rowley, who are believed to have come into contact with a bottle of Novichok discarded by the Skripals' attackers.