Juries in criminal trials do not base verdicts on uncorroborated testimony given by any one witness  Rightly so, because it is usually prudent to be highly skeptical of unsubstantiated claims made by any one person
But then, to be consistent, juries should end an all-too-common practice: convicting defendants on the basis of an uncorroborated full confession
Highly suggestible people who are accused of wrongdoing sometimes become so unsure of their own recollection of the past that they can come to accept the accusations made against them.