One of the most frustrating responses conservative acquaintances made during the Kavanaugh hearings was alluding to the "utter lack of evidence" with which the beer-loving jurist was being crucified.

Testimony is, of course, evidence.

There are people serving time in federal penitentiaries convicted entirely on the word of an alleged co-conspirator (in all fairness, this almost never happens in matters of state law, but in federal law such convictions are allowed). So, when convenient to the authorities, testimony is quite powerful indeed.