Many controversial pages on Wikipedia have a clearly identifiable bias which becomes impossible to edit because, as you mentioned, they are somewhat 'protected.

Many controversial pages on Wikipedia have a clearly identifiable bias which becomes impossible to edit because, as you mentioned, they are somewhat 'protected.' For such instances it is always advisable to go directly to genuine source materials, e.g., case records or legal documents. Were I a teacher I would not accept any compiled source as a citation because the skill of digging deep enough to find the closest thing to the truth is too valuable to do otherwise.