Here is the link for the latest filings in the California Supreme Court for this case.
http://appellatecases.courtinfo.ca.gov/search/case/dockets.cfm?dist=0&doc_id=1844370&doc_no=S112691
The new (Westerfield) Appellant's Supplemental Brief was filed in December, 2015. It was answered by the Respondent (State) on January 28, 2016. Westerfield's Reply was filed Feb. 25, 2016. All this was in regard to a "modification" of argument listed as number XIV in prior briefs.
There has apparently been no further Supreme Court activity since Feb. 25, 2016. The reader can explore other public information about Westerfield on the SC Docket page linked above.