Death of Alexei Navalny
Russian opposition leader Alexei Navalny died from a dart frog toxin identified as epibatidine. The poison, naturally produced by wild dart frogs in South America, indicates that Navalny did not accidentally ingest the substance.
The Toxin: Epibatidine and State Involvement
The UK government stated that only the Russian state possessed the means, motive, and opportunity to deploy epibatidine against Navalny during his imprisonment. Epibatidine is a potent painkiller, significantly stronger than morphine, and can induce muscle paralysis, leading to suffocation. Notably, no known antidote for epibatidine exists.
While seemingly uncommon, epibatidine's structure is known and can be synthesized in laboratories. Researchers, including those in Russia, have studied related chemicals to harness its analgesic properties without the high toxicity. Epibatidine and its analogues are also commercially available for research purposes.
Historical Context and Expert Perspectives
Russia has a documented history of using poisons against perceived threats, including the 2006 polonium-210 poisoning of Alexander Litvinenko and the 2018 novichok poisoning of Sergei Skripal and Yulia Skripal. Russia is known to have facilities for chemical synthesis.
Yvette Cooper, UK foreign secretary, suggested the use of epibatidine signaled Russia's capabilities and fear of political opposition. However, experts offer varied interpretations regarding the specific choice of toxin.
Alastair Hay, professor emeritus of environmental toxicology, University of Leeds, suggested epibatidine's difficulty in detection might have been a key reason for its use, given that its potency would mean only small quantities in the body.
The identification of the toxin was attributed to advanced instruments and samples reportedly smuggled out of Russia by Navalny’s widow, Yulia Navalnaya.
Dr. Brett Edwards, an expert in biological and chemical weapons at the University of Bath, noted that other poisons or methods could have been used if the goal was deniability or to avoid detection. He suggested that Navalny's high-security prison status implied the toxin's deployment was a deliberate choice. Edwards also mentioned the delay in releasing Navalny's body, potentially to complicate sample analysis.
Dr. Luca Trenta, an associate professor of international relations at Swansea University, viewed the case as less overtly signaling compared to previous incidents like the Litvinenko or Skripal attacks. Trenta posited that Russia might have been testing epibatidine, showcasing its capabilities, or using a severe weapon for retribution. He also highlighted Russia's disregard for international norms.
Despite the intriguing choice of weapon, Dr. Edwards concluded that the event constitutes a "standard political murder" consistent with historical patterns.