Police are expected to take months to complete an investigation into the poisoning of a British couple who remain in critical condition in Wiltshire, England, officers said.
Dawn Sturgess, 44, and Charlie Rowley, 45, fell ill on June 30 after being exposed to a military-grade nerve agent, Novichok, the same nerve agent that nearly killed ex-Russian spy Sergei Skripal and his daughter, Yulia.
