He didn't get the part because producers didn't think he could be taken seriously as a cold-blooded killer.
Sunny areas: Butterflies are cold-blooded so they need the sun's warmth to remain active.
It is perhaps the worst crime, because the most cold-blooded and ungenerous, which can be laid to his charge.
In September this was taken by storm; Kolokotrones rode in triumph to the citadel over streets carpeted with the dead; and the crowning triumph of the Cross was celebrated by a cold-blooded massacre of 2000 prisoners of all ages and both sexes.
In less highly integrated organisms, such as "cold-blooded" vertebrates, the point of death is less conspicuous, and when we carry our observations further down the scale of animal life, there ceases to be any salient phase in the slow transition from life to death.