Does a federal district court have to consider sentencing disparities between co-defendants who have a similar criminal record?

We also reject this argument. 18 U.S.C. 3553(a)(6) requires that a sentencing court consider the need to avoid unwarranted sentence disparities among defendants with similar records who have been found guilty of similar conduct, not that it consider the disparities between co-defendants. See United States v. Frias , 521 F.3d 229, 236 (2d Cir. 2008) (We have held that section 3553(a)(6) requires a district court to consider nationwide sentence disparities, but does not require a district court to consider disparities between co-defendants.).