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Derbyshire was credited with the reporting.
A lawyer for Edwards was contacted for comment.
The corporation declined to comment on its reporting.
BBC ‘Newsnight’ presenter Victoria Derbyshire.BBC
This source said they would not describe the reporting as an investigation.
BBC News has played an important role in expanding a fast-moving and messy narrative about Edwards.
Former BBC journalists have voiced disquiet at the idea of reporters investigating one of their own.
BBC News anchor Huw EdwardsGetty
A senior insider said it was a no-win situation for BBC News.
Others have accused the BBC of self-flagellation.
Others have noted their admiration for the BBCs approach.
CNNs Senior Media Reporter Oliver Darcy described the BBCs reporting as unflinching in an analysis piece on Wednesday.
