Hallahan v. Ashland Chemical Co.
Plaintiff William Hallaban, diagnosed with granulocytic leukemia, commenced a products liability action, alleging workplace chemical exposure as the cause. During discovery, defendants sought to depose plaintiffs' expert witnesses, physician Stewart Silvers and chemist Harold Zeliger, citing "special circumstances" due to the alleged novelty of their causation theories and a change in Silvers' diagnosis from acute to chronic granulocytic leukemia. The Supreme Court denied the defendants' motion, finding no special circumstances. The Appellate Division affirmed this decision, stating that the defendants' claims of "novel, unorthodox and unsupported" expert opinions did not constitute special circumstances for an oral examination of the experts before trial, especially as defendants had access to Silvers' medical records.