Cite as: 519 U. S. 433 (1997)
Opinion of Thomas, J.
that merely altered the availability of "good conduct" credits ran afoul of the Ex Post Facto Clause. Id., at 25. The present case involves not merely an effect on the availability of future release credits, but the retroactive elimination of credits already earned and used. Accordingly, I concur in part and concur in the judgment.
451
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