Can a federal sentencing court modify a term of imprisonment once it has been imposed?

"A federal court generally 'may not modify a term of imprisonment once it has been imposed."' Dillon v. United States, 560 U.S. 817, 819 (2010) (quoting 18 U.S.C. 3582(c)). However, a federal sentencing court is authorized to modify an imposed sentence when the relevant sentencing range was lowered subsequent to a defendant's original sentence. See 18 U.S.C. 3582(c)(2); see also United States v. Dunn, 728 F.3d 1151, 1155 (9th Cir. 2013) (a district court

Page 3