Consider several things in your answer: 1) does the person have a tendency to lie, or tell the truth, 2) have they committed any crimes, and what was involved in those crimes, and 3) does the person hold any noxious views that might make people disregard other things they might say? Some figures may be trustworthy, but only knowledgeable about some things--what can they speak on with authority?
Would the following people be good sources or bad sources for informations if you are writing an essay? Explain why.
Stephen Glass, former American Journalist