Juan Jose De La Cruz appeals the 15-month sentence imposed upon revocation of supervised release. “This Court must examine the basis of its jurisdiction, on its own motion, if necessary.” Mosley v. Cozby, 813 F.2d 659, 660 (5th Cir. 1987). The website of the Bureau of Prisons shows that De La Cruz was released from prison on June 20, 2012, and the district court imposed no further term of supervised release. Therefore, De La Cruz has no “concrete and continuing injury,” and there is no case or controversy over which this court may exercise jurisdiction under Article III, § 2, of the Constitution. See Spencer v. Kemna, 523 U.S. 1, 7, 118 S.Ct. 978, 140 L.Ed.2d 43 (1998). Consequently, the appeal is DISMISSED as MOOT.