Yes, it may be as well to check at the police station concerned to see if any communication has gone astray, but subject to that she was told she would be informed whether she needed to do more and she has heard nothing.
Just in case make sure you make a note of the conversation with the investigating officer , when it took place, what was said and keep it
I hope this helps. If there are any further points please reply
This will put her at ease, we will check with police station in the morning.