were based only on Martin’s self reports and Martin’s mother’s suspicions, and not confirmed by outside records. In addition, Martin’s age as a mitigating factor does not persuade us that the death penalty is disproportionate here. Martin was twenty-one years old at the time he committed this murder. Despite Martin’s age, the trial court imposed a death sentence. In Philmore v. State, this Court upheld the death penalty where a judge imposed death even though the defendant was twenty-one at the time of the crime. See 820 So.2d 919, 940 n. 5 (Fla.2002). This Court noted that the trial court had found that the Philmore defendant “acted in a mature manner and showed ‘criminal sophistication’ in carrying out the crimes.... ” Id.; see also Evans v. State, 808 So.2d 92, 109 (Fla.2001) (<HOLDING>). In Martin’s case, the trial court made
holding the death penalty proportionate where the nineteenyearold defendant failed to establish that he was immature at the time of the murder and the record established that he was the mastermind behind the murder holding that it was not error to allow the penalty phase jury to hear evidence that the defendants previous conviction of seconddegree murder was obtained pursuant to an indictment for firstdegree murder holding that indictment for murder in the first degree charges murder by whatever means it may have been committed regardless of the theory of murder presented to the grand jury holding that defendants plea to second degree murder charges was involuntary when he was a nineteenyearold man with substantially below average intelligence the trial court had not discussed the elements of the crime and the trial court had made no reference to the requirement that the defendant must have intended to cause the victims death holding undisclosed statement that someone other than the defendant possessed the murder weapon three weeks after the murder was not material exculpatory evidence in light of this overwhelming evidence that buehl had the murder weapon at the time of the killings and that he was the murderer