"Why anyone in the Sussex Police thought it appropriate to disclose that they are investigating an earlier incident knowing, unless he/she was a naive half-wit, that there was a very high risk the information would be leaked to the press and, if it was, that the press would certainly publicise the earlier incident."
because the police have their own agenda's and they can't be trusted not to leak like a sieve when it suits them - and that's verbatim from my Media Training course
at least these days they're less likely to take backhanders from the newspapers when they do it