The federal judge overseeing the multidistrict litigation over claims linking Monsanto’s herbicide Roundup to cancer said the lead plaintiffs lawyer trying the first bellwether case showed “bad faith” by defying his orders to stick to scientific evidence during her opening statement.

U.S. District Judge Vince Chhabria of the Northern District of California held a hearing Tuesday afternoon at the end of second day of the first bellwether trial to consider whether to sanction Aimee Wagstaff of Andrus Wagstaff, one of two lead counsel in the first case.