Here are the materials:
Opening brief is here, and lower court materials here.
Details here, from the Bustamante filing:
Respondents argue that because Mr. Bustamante has completed his sentence and been released from custody, and because Mr. Bustamante’s habeas petition challenges only the length of his sentence, his appeal should be dismissed on grounds of mootness. Upon review of Respondents’ motion and pertinent authorities, including North Carolina v. Rice, 404 U.S. 244 (1971), Mr. Bustamante, by and through undersigned counsel, agrees with Respondents’ contention and does not oppose Respondents’ motion.
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