You or the prosecution may request for a Newton hearing at any stage of the sentencing process. This happens if there is a dispute of any fact which may materially affect your sentence.
Some examples include:
A Newton hearing is conducted like a trial. Both you and the prosecution will have a chance to call and examine witnesses through the 3 stages of examination-in-chief, cross-examination and re-examination before closing submissions are made.
The judge will then make their decision on the disputed issue of fact. Once the decision has been made, the judge will proceed with the rest of the sentencing process.