Scotland Yard investigated a journalist trying to expose a plagiarism row and told him to stop asking a Cambridge professor questions. The officer told me that I shouldn't contact Professor Arday again because his mental health had been affected by my actions. "I asked him what I had done, and he said there had been online posts about Professor Arday. He didn't really respond but repeated his request for me not to contact Professor Arday again, citing his mental health. Prof Arday has, in recent days, put his apparent plagiarism down to autism, saying he absorbs information through mimicry.