In addition, if you feel that you want to continue with your original statement but think you'll suffer more intimidation, there are methods in place to help you give evidence. For example, you may be able to give your evidence via a video link (so you don't actually have to stand up in the witness box) or you may be able to give your evidence from behind a screen (ie. anonymously). However, if you believe that the person in question is harassing you, it's fair to assume that they already know you're involved in the case so any measure put in place now will not protect your identity. If this matter is affecting you or your partner's health, I would recommend that you make a withdrawal statement as described above.