How do you know she dropped the allegation?
Oh yes, but it just isn't their priority. They are not under time pressure with a case of this kind.
So they have taken their time about it.
It might even be that they have reviewed it recently.
Time really isn't an issue here. The issue is whether he should comment.
The officer is talking nonsense. They don't need his account at all. They might well prefer to have it but that is a different issue. If the matter is genuinely closed then it is a complete waste of public money and, in fact, an unlawful arrest.
The reality is that it will not be closed.
If he is going to deny the allegation then he should probably answer questions. If not then he should answer no comment.
A prepared statement might be better though. Reduced opportunity to say something contrary to interest.
Can I clarify anything for you?
Well, she may not understand the distinction. She won't be lying.
But you should not underestimate the risk that he faces. They can always summons his accuser.
Their game may be in the hope he admits the offence so he could be given a caution to improve their statistics.
Do not make it easy for them.