I'm not going to address the last few posts on a point-by-point basis. But ...
The attached document is a sentencing memorandum. It is not an appeal. It reflects the judge's reasoning for the sentence imposed. It is not particularly generous toward David, but it is certainly not prejudicial, at least as that term is used in the law. David was already found guilty of murder, which is the intentional killing of another. Just as the jury hears and considers the evidence, the judge does, too. In the U.S., the judge is sometimes considered the "13th juror." In this role, the judge can say "I'm not persuaded of the defendant's guilt beyond a reasonable doubt," and since in the U.S., we require a unanimous verdict, such a conclusion requires that the defendant be acquitted. Since the BVI does not require a unanimous verdict, I'm not sure how the judge fits into the picture.
The judge is the one to set the terms of a defendant's sentence. It is customary for the judge to explain the basis for a sentence. Since the law requires the judge to take into account matters of aggravation and mitigation, the judge must make his or her own findings. The judge is not obligated to believe a defendant's testimony. (After all, to even get to the point of a sentence, the jury must have already found the defendant guilty and presumably, the judge does not strongly disagree.)
Thus, it is not improper for the judge to call a defendant a murderer or to say the murder was premeditated and/or for financial gain, etc. The judge may call a spade a spade after the jury declares the spade is a spade.
As a side note, the bit about David telling Brown to get rid of the equipment: We "know" what David says he said. We do not now what Brown said David told him. Nor do we know what Shelley's family said about what they told David. For all we know, they all contradicted David. And, if so, the judge and jury were at liberty to disbelieve David.