The inquiry into the poisoning of ex-Russian spy Sergei Skripal revealed police initially overlooked critical information regarding his residency in Salisbury. Counter-terrorism officials dismissed the incident, leading to significant consequences, including the death of Dawn Sturgess from Novichok exposure. Former officer Nick Bailey, who was poisoned during the investigation, described lasting mental and physical effects. The inquiry continues as officials seek to understand the handling of the case and its aftermath.