A defendant's statement can affect his sentence. It can make it worse or better. Before a defendant decides to utter anything at sentencing, he should most certainly ask his attorney if it is advisable. The attorney may have experience with the judge and know how he or she will respond.
The response above is not intended as legal advice since it’s impracticable to provide thorough, accurate advice based upon the query without additional details. It is highly recommended that one should seek advice from a criminal defense attorney licensed in your jurisdiction by setting up a confidential meeting. Moreover, this response does not constitute the creation of an attorney-client relationship since this message is not a confidential communication because it was posted on a public website, thereby publicly disclosing the information, which is another reason to setup a confidential meeting with an attorney.