British Police are working on the theory that Dawn Sturgess and her boyfriend Charlie Rowley handled an object contaminated with the nerve agent Novichok; probably remnants from the March attack on Sergei and Yulia Skripal. But as Redmond Shannon reports, experts disagree as to whether discarded traces of the nerve agent could stay potent for four months.
- British police officer cleared after being tested for nerve agent exposure
- British counterterrorism police investigating after unknown substance leaves 2 people critically ill