EllanVannin, he called the police initially, then the police assessed the scene and decided an offence had been committed. At that stage, they didn't need his confirmation, if they had enough evidence at the scene. Examples of what they could have used if he was not prepared to press charges would have been that he had an injury the shape of a lamp and her fingerprints were on the lamp etc. If they then took it to the CPS, the CPS would have looked at whether the evidence was enough to convict, and then considered if it was in the public interest. At this stage they would have been mindful of the recent interest in the topic of female domestic abusers and may have considered that the public would like to be reassured that men were getting protection too. In this respect Caroline's fame probably was working against her inasmuch as being a "good" example case.