Thanks to Nick Gray:
@Noiseheads on Twitter asked Alice In Chains singer William DuVall, “So are you still writing your own material? Any new AIC that features you on lead vox?
William DuVall responded “Yes and yes.” On Black Gives Way to Blue DuVall sang lead vocals (without any backing vocals or layered vocals with Jerry Cantrell) on “Last of My Kind” and wrote the lyrics/melody to the song. His only other co-songwriting credit on the album was “A Looking In View.” DuVall wrote a song called “Tongue Tied” about his friend that committed suicide that was cut from the album. Alice In Chains are set to release their fifth studio album this year.