Nicholas v. Fenton

affirming denial of self-representation based on finding of mental illness even though defendant competent to stand trial | upholding death penalty under 1977 statute prescribing aggravating and mitigating circumstances in bifurcated system | "vileness" and "dangerousness" predicates for imposition of the death penalty do not impermissibly fail to guide the jury's discretion | state constitutional prohibition against ex post facto laws invalidated the death sentence when the defendant committed the crime at a time the Tennessee death penalty statute was unconstitutional | state constitutional prohibition against ex post facto laws invalidated the death sentence when the defendant committed the crime at a time the Tennessee death penalty statute was unconstitutional | “Battery which, qualitatively and quantitatively, is more culpable than the minimum necessary to accomplish the act of murder.” | no ex post facto violation because changes to death penalty statute were procedural and ameliorative | employer implemented changes five weeks after the expiration of the contract