Thе defendant was charged with armed robbery. On July 19, 1976, the court appointed counsel and entered a pro forma plea of not guilty to the charge, and trial was set for September 1, 1976. On that date the defendant appeared with his counsel and personally informed the court of his desire to change his plea from not guilty to not guilty by reason of insanity. The court denied the request because dеfendant had failed to give notice of his intention to rely upon the defense of insanity as required by V.R.Cr.P. 12.1 (а). He countered by claiming that he had not been informed of the notice requirement. Noting that the case had been set for some time, the court asked counsel whether he was prepared to go to trial. Counsel responded that he was prepared, and the jury was empanelled which ultimately convicted the defendant.
On appeal from the judgment entered upon the verdict оf guilty, the defendant claims that the trial court should have relieved him of the notice requirement and thаt the failure to do so deprived him of his constitutional right to present an insanity defense.
*41
Although, the plea of not guilty by reason of insanity was abolished upon our adoption of the Rules of Criminal Procеdure,
State
v.
Lapham,
Under former 13 V.S.A. § 6562, as construed by this Court in
State
v.
Rickert,
The test of an abuse of discretion in this state is the failure to exercise discretion or its exercise on reasons clearly untenable or to an extent clearly unreasonable, and so lоng as a reasonable basis for the court’s discretionary action is demonstrated, this Court will not interfere.
Brooks
v.
Brooks,
Since the defendant had not complied with the notice requirements, it became incumbent upon him to offer
*42
facts, circumstances, representations or testimony demonstrating support for an insanity defense, in addition tо sufficient explanation for Ms tardiness in raising it. See
State
v.
Rickert, supra,
Furthermore, the failure of the court to hold an omnibus hearing lends no support to the defendant’s claims. Such hearings are not required unless requested by a party or by the court on its own motion. V.R.Cr.P. 12(f). The record reveals no request made by the defendаnt or his counsel, and no other reason why the court should have proceeded with a hearing on its own motion. Likewise the record indicates there was neither a motion for continuance mаde once the court had denied defendant’s motion for a change of plea, nor grounds to support such a motion had one been made. Ordinarily, what is not raised below, we will not consider hеre.
Harrington
v.
Decker,
Finally, the defendant would bolster Ms argument that he was denied his constitutional right to raise an insanity defеnse by reference to a post-conviction psychiatric report which he claims indicаtes the possibility of such defense. However, this report was not only non-existent at the time of the сourt’s ruling, but was never placed before the court for consideration in connection with the claims of error presented here in any post-trial motion for new trial or arrest of judgment. Since thе claim is made for the first time in this Court, we give it no consideration.
Harrington
v.
Decker, supra,
*43 No abuse of discretion having been demonstrated, our entry ■will be: judgment affirmed.
