Matter of Rico, 16 I. & N. Dec. 181, 186 (BIA 1977); Alarcon-Serrano v. INS, 220 F.3d 1116, 1119 (9th Cir. 2000) (BIA did not rest on the evidence of Rico's arrest for drug trafficking, but detailed all of the evidence against him, including the undisputed fact that he had a "large quantity of marihuana concealed in his motor vehicle" at the time of his arrest).