Although co-deft was correctly granted the writ on question of severance at trial, a subsequent change in the law has established that there was no confrontation clause issue requiring severance, and since the present petitioner is not being held in violation of the law, Habeas would not run.
http://www2.ca3.uscourts.gov/opinarch/173118p.pdf
Since 2011. An occasional commonplacing of the U.S. Circuit Courts of Appeal.
Neither an authoritative statement of the law nor legal advice. Quick work.