Meta’s lead attorney Mark Hansen is using cross-examination to attack Hemphill’s credibility. Hansen calls him the “very definition” of a witness with preconceived notions about Meta’s liability and brings up what a press report called a “roadshow” he embarked on in 2019 with former Biden administration official Tim Wu and Facebook co-founder Chris Hughes to encourage state and federal enforcers to look into Meta’s potentially anticompetitive behavior. Hansen charges that Hemphill hasn’t adequately disclosed this activity, which the Meta attorney characterizes as advocacy for a cause. Hemphill says he wasn’t advocating that they bring a case, but to probe and find out if a valid case existed.