487 F.3d 25 UNITED STATES of America, Appellee,v.Lorenzo MU?OZ-FRANCO, Francisco S?nchez-Ar?n, Ariel Guti?rrez-Rodr?guez, and Wilfredo Umpierre-Hern?ndez, Defendants, Appellants. No. 04-1532. No. 04-1533. No. 04-1534. No. 04-1535. United States Court of Appeals, First Circuit. Heard December 6, 2006. Decided May 22, 2007. Mark J. Rochon, with whom Duncan N. Stevens and Miller & Chevalier were on […]