I "THE TRIAL COURT GRAVELY ERRED IN GIVING FULL WEIGHT AND CREDENCE TO THE TESTIMONIES OF THE PROSECUTION WITNESSES AND IN DISREGARDING THE THEORY OF THE DEFENSE. II THE TRIAL COURT GRAVELY ERRED IN FINDING THE ACCUSEDAPPELLANT GUILTY BEYOND REASONABLE DOUBT OF THE CRIME CHARGED DESPITE INSUFFICIENCY OF EVIDENCE."xv[15] On March 20, 1997, appellant presented a motion to withdraw the appeal. Acting thereupon, the Court directed his counsel to confer with appellant and ascertain the voluntariness of subject motion, and whether appellant was aware of its legal consequences. After confering with the accused on October 29, 1997, counsel prayed that the Motion to Withdraw the Appeal be disregarded. The pivotal issue at bar being factual and evidentiary, the credibility of the witnesses assumes extreme importance. Well-entrenched to the point of being elementary is the doctrine that on the issue of credibility of witnesses, findings arrived at by the trial court are accorded great weight and respect on appeal because of the singular opportunity of the lower court to observe the demeanor of the witnesses on the witness stand. "xxx Factual findings of fact of the trial court pertaining to the credibility of witnesses command great weight and respect since it had the opportunity to observe their demeanor while they testified in court." xxx (People v. Tanedo, 266 SCRA 34) "Well-entrenched is the rule that findings of trial courts on credibility of witnesses deserve a high degree of respect. "(People v. Atad, 266 SCRA 262)" "Findings of the trial court which are factual in nature deserves to be respected and affirmed by the appellate courts. xxx" (People v. Magallano, 266 SCRA 305) "xxx Unless the trial judge plainly overlooked certain facts of substance and value which, if considered, might affect the result of the case, his assessment on credibility must be respected." (People v. Ramirez, 266 SCRA 335) "xxx The age old-rule is that the task of assigning values to the testimonies of witnesses in the stand and weighing their credibility is best left to the trial court which forms its first-hand impressions as a witness testifies before it. xxx (People v. Sarabia, 266 SCRA 471) Factual findings and conclusions of the trial court are entitled to great weight and respect and should not be disturbed on appeal. xxx (People v. Cahindo, 266 SCRA 554)