I don't think the death penalty would ever be considered in this case, regardless of how heinous the crime seems. For one, if a R were to be arrested/charged, they'd likely plead to manslaughter, say it was an accidental death (a la Casey Anthony), find some bogus explanation for the vaginal injuries and the rest (the staging) would be charged as desecration of a corpse/tampering with evidence, etc. and none of the charges would carry a death penalty.
I agree. Alex Hunter was known for the fact that he NEVER asked for the death penalty.