Public accusations and Christian charity

There is little doubt that the Herman Cain campaign has poorly handled the various accusations leveled against him. See Al Mohler’s article for details of the most recent ineptitude.

Further investigation of Cain’s accusers by alternative media raises legitimate questions about their veracity. Aside from the effects that such charges have on Cain’s presidential campaign, how should Christians assess their effect?

The Old Testament contained provisions requiring the testimony of two witnesses to support certain charges. The Ninth Commandment directs us not to bear false witness, and given Jesus’ own expansive view of moral commands, one would reasonably expect that a corollary to the Ninth Commandment is that Christ-followers bear some responsibility not to knowingly receive false witness.

What is the responsibility of Christians in evaluating such charges and drawing conclusions from them?