Court of Appeals for the Ninth Circuit April 1, 2008, No. 07-10207 (United States v. Perez)

lead-opinion

MEMORANDUM *

Juan Alfredo Perez challenges his conviction and sentence for the transportation of illegal aliens in violation of 8 U.S.C. §§ 1324(a)(l)(A)(ii) and (a)(l)(B)(iii). We reverse because the district court erred by *611admitting prejudicial expert testimony on alien smuggling organizations, and the error was not harmless. See United States v. Pineda-Torres, 287 F.