In arguments scheduled for February 22 (Holmes v. South Carolina), the High Court will review the South Carolina standard, which requires a reasonable inference of innocence, before a criminal defendant can point the finger at another person.
Holmes wants to introduce statements from another other man and witnesses who claim to have seen the other man the night of the killing. The other man has denied in court any role or knowledge of the crime, and his DNA did not match the DNA collected by police that links Holmes to Stewart. Holmes alleges that the trial jury should have heard this evidence which was ruled out by the judge.
An article on the Holmes case can be found here.