In further support of a factual basis for the plea, the state submitted a transcript of the grand jury proceeding and the result of the autopsy showing that Dewitt died from a stab wound in his neck.
After accepting the plea of guilty, the court proceeded to the sentencing phase of the trial. Appellant waived the right to have a jury hear the evidence and submit an advisory sentencing verdict. The state presented evidence showing that at the time of the murder, appellant was serving a sentence for another first-degree murder. Appellant declined to present any evidence in mitigation. After hearing arguments from both sides, the trial judge found that the murder was committed in a cold and calculating manner and that appellant was serving a term of imprisonment for murder at the time and sentenced appellant to death. In his written findings in support of the death penalty, however, the judge failed to mention the aggravating circumstance of the murder being committed in a cold and calculated manner. Instead he wrote:
The question of penalty was addressed. The Court finds the following aggravating factors apply in this case:
• The Defendant was under sentence of imprisonment—for murder—when this crime was committed.
• The Defendant had previously been convicted of First Degree Murder and Robbery.
There are no other applicable statutory aggravating factors.
There are no applicable statutory mitigating factors. The record shows this was a merciless revenge killing; planned over a period of two years; coldly executed and cruel. The Defendant shows no remorse but seeks rather a chance to kill again.
In this appeal Agan raises four issues concerning the propriety of the death sentence. His first argument is that the trial court improperly found as two separate aggravating circumstances that he was under sentence of imprisonment and that he had previously been convicted of a crime involving violence. However, where these two aggravating factors are not based on the same essential feature of the crime or of the offender’s character, they can be given separate consideration. Waterhouse v. State, 429 So.2d 301 (Fla.1983).
Appellant’s second argument is that the trial court improperly considered lack of remorse as an aggravating circumstance. This Court recently held that lack of remorse may not be considered as an aggravating circumstance or in enhancement of a proper statutory aggravating circumstance. Pope v. State, 441 So.2d 1073 (Fla.1983). However, as the above-quoted findings indicate, the trial court mentioned lack of remorse not in connection with aggravating factors but rather in connection with the finding that there were no mitigating circumstances. The judge referred to the absence of remorse in support of his rejection of defense counsel’s arguments for mitigation on the ground of mental or emotional disturbance and on the ground of appellant’s prompt confession and plea of guilty. Thus the evidence was used not in aggravation but only to negate mitigation. There was no error in this limited consideration of the absence of remorse for his crime on the part of appellant.
Next appellant argues that the trial court erred in not considering his age, 54, as a mitigating circumstance. This mitigating circumstance usually applies to those youthful in age because of society’s responsibility for overseeing the welfare of the young. Since society also has the responsibility of protecting those suffering from the infirmities of aging, see In re Byrne, 402 So.2d 383 (Fla.1981), appeal dismissed, 455 U.S. 1009, 102 S.Ct. 1699, 72 L.Ed.2d 127 (1982), this mitigating circumstance may also be applied to older persons. However, we do not find that at the time of the crime appellant had reached an age requiring special consideration. We therefore find no error in not finding his age to be a mitigating circumstance.
Finally, appellant argues that the trial court erred by failing to consider any