United States Sixth Circuit

In plaintiffs' suit against several manufacturers of welding supplies, claiming that the fumes from their products had caused his parkinsonism and that labels on the products had failed to warn of the danger, jury's verdict in favor of the plaintiffs is reversed as the district court exceeded its discretion in admitting an expert's opinion that the manufacturers' products triggered "manganese-induced parkinsonism" in plaintiff, because the "knowledge" requirement of Rule 702 requires more than subjective belief or unsupported speculation.

Appellate Information

• Argued 11/18/2009
• Decided 09/08/2010
• Published 09/08/2010

Judges

• SUTTON

Court

• United States Sixth Circuit

Counsel

• For Appellant:
  
• Stephen J. Harburg, Paul Michael De Marco