In addition to the mitigating circumstances specified in Section 13A-5-51, mitigating circumstances shall include any aspect of a defendant's character or record and any of the circumstances of the offense that the defendant offers as a basis for a sentence of life imprisonment without parole instead of death, and any other relevant mitigating circumstance which the defendant offers as a basis for a sentence of life imprisonment without parole instead of death.
Ala. Code § 13A-5-52 (1975)