CZ:Managing Editor/2010/002 - References to war criminals

The basic question: is it acceptable and objective to use, in general article text, the term "war criminal" to someone for which a great deal of incriminating data was listed, but was never tried and convicted by a court, such as Adolf Hitler or Josef Mengele? If that is unacceptable, should the words "war criminal" be deleted from a direct quote stating an expert opinion?

Howard Berkowitz