Rule 132, Section 20of the Rules of Court provides the following means of authenticating the document: SEC. Any other private document need only be identified as that which it is claimed to be.

With this right of repose, the criminal justice system has built in a protection to insure that the innocent, even those whose innocence rests upon a jurys leniency, will not be found guilty in a subsequent proceeding.

The only instance when double jeopardy will not attach is when the trial court acted with grave abuse of discretion amounting to lack or excess of jurisdiction, such as where the prosecution was denied the opportunity to present its case, However, while certiorari may be availed of to correct an erroneous acquittal, the petitioner in such an extraordinary proceeding must clearly demonstrate that the trial court blatantly abused its authority to a point so grave as to deprive it of its very power to dispense justice.

In other words, an admission is something less than a confession, and is but an acknowledgment of some fact or circumstance which in itself is insufficient to authorize a conviction, and which tends only to establish the ultimate fact of guilt. It can not be denied that the contents of Exhibit LL, particularly with regard to the details of the shooting communicated by petitioner to Atty.

(Emphasis ours) There is no question that the letter dated June 14, 1995 is an admission, not a confession, because of the unmistakable qualification in its last paragraph that For all intense (sic) & purposes, this letter shall serve as a voluntary surrender, without admission of guilt on the part of my client. Valmonte, is privileged because it is connected with the business for which petitioner retained the services of the latter.

Thus Green expressed the concern that (t)he underlying idea, one that is deeply ingrained in at least the Anglo-American system of jurisprudence, is that the State with all its resources and power should not be allowed to make repeated attempts to convict an individual for an alleged offense thereby subjecting him to embarrassment, expense and ordeal and compelling him to live in a continuing state of anxiety and insecurity, as well as enhancing the possibility that even though innocent, he may be found guilty.

The philosophy underlying this rule establishing the absolute nature of acquittals is part of the paramount importance criminal justice system attaches to the protection of the innocent against wrongful conviction.

A confession, on the other hand, under Rule 130, Section 33 is the declaration of an accused acknowledging his guilt of the offense charged or any offense necessarily included therein.

More particularly, a confession is a declaration made at any time by a person, voluntarily and without compulsion or inducement stating or acknowledging that he had committed or participated in the commission of a crime.

Neither did it subpoena P/Senior Inspector Alejandro M.