The special master in the opioid lawsuits showed no bias in an email he inadvertently sent to lawyers in the case, according to a filing from plaintiffs’ attorneys this week.

On Wednesday, lawyers for the plaintiffs’ executive committee in the opioid multidistrict litigation opposed a motion to disqualify David Cohen, who accidentally hit “reply all” on an email he meant to send to himself. Lawyers for two pharmacy benefit managers, defendants in dozens of opioid cases, filed a motion to disqualify him, insisting that the email would lead “any reasonable observer to question his impartiality.”