I have to say that I see little that is odd in this appeal. Do not forget that he is a teacher (so likely to be pedantic in his use of language) and that the appeal was almost certainly passed through other hands, including the police, and finessed to use their input. Public appeals usually come across as somewhat stilted in their use of language and this is no exception. That does not make it either surprising or having any clear implications for the case. Assuming it went through the hands of Surrey Police I am only surprised it does not read as translated from Chinese, having seen many of their statements in the local media.
Edit; apologies, I made this reply to the wrong post but I think the comments are self explanatory.
Edit; apologies, I made this reply to the wrong post but I think the comments are self explanatory.