Key Toxicology Expert Witness Excluded in Grace Trial

A federal prosecutor dropped key toxicology expert witness Christopher Weis from the case against W.R. Grace & Co. saying the move would significantly curtail the government’s case after U.S. District Judge Donald Molloy had told the parties to “move the case along.”

Weis, a toxicologist for the U.S. Environmental Protection Agency arrived on Libby’s front lines in 1999 to investigate reports of widespread asbestos contamination. He and other emergency response workers were the impetus behind government efforts to clean up Libby and investigate Grace’s alleged criminal conduct. Grace, a global chemical and building materials company, and five former company executives are charged with a federal conspiracy involving Clean Air Act violations and obstruction of justice.

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