A spokesperson for the Argentine government confirmed to Insider that an investigation had been launched into Kalcker.
The spokesperson represents the UFIMA agency (Unidad Fiscal para la Investigación de Delitos contra el Medio Ambiente) agency, which investigates medical crimes.
The UFIMA spokesperson said that after an initial investigation, the matter was referred to federal prosecutors who probe serious crimes.
Insider understands that Kalcker has not been formally charged with any crimes.
According to the Argentinian legal documents seen by Insider, Kalcker is in Switzerland. In a response to Insider’s request for comment, he did not directly address the allegations, but argued that chlorine dioxide in the doses he recommends is not toxic.