What is the difference with a friendly witness and a unfriendly witness?

Answer 1

Friendly witnesses were those who answered questions about themselves and others.

Unfriendly witnesses, those who refused to cooperate with the Senate hearings,

Answer 2

A friendly witness is cooperative and willing to provide helpful information to the court or litigants, while an unfriendly witness is uncooperative or hostile toward one or both parties in a legal proceeding. A friendly witness typically supports the case of the party calling them, while an unfriendly witness may be adverse or contradictory to the interests of the party calling them.