testified
v.v. to give a formal statement in a court of law about what you saw or know. It can also mean to show clearly that something is true.
v. to give evidence as a witness in a legal proceeding or other formal inquiry. In a broader sense, it serves as evidence or proof of a particular fact or quality.
The witness testified that she saw the car hit the fence.
Several former employees testified before the committee regarding the company's safety violations during the previous year.
The ruins of the ancient temple testified to the architectural sophistication of a civilization that had flourished long before the arrival of modern explorers.
The verb is intransitive when used in a legal context, often followed by 'against' or 'on behalf of'. In its broader sense of providing proof, it often takes the preposition 'to'.
he testified the truthhe testified to the truthWhen used to mean 'provide evidence for', the verb requires the preposition 'to' before the noun phrase.