The Donne Affair: Questions in the House
This, quite frankly, is total bollocks. If the evidence was contested, then the standard practice is to include it in the report, note its disputed nature and draw (or avoid drawing) conclusions from it. What is not done is to delete the evidence so that it does not appear in the report. If the words "that won't be necessary" didn't appear in the report, it's because they don't appear in the statements of Peter Doone, his wife and the rookie Police Officer about the incident. Since Helen had a draft report at hand, she must have known that what she was confirming was not true at the time even if she can't remember it later.