UNITED STATES, APPELLEE, v. ALVARO ROJO-ALVAREZ, DEFENDANT, APPELLANT. UNITED STATES, APPELLEE, v. ADALBERTO FRANCO-MONTOYA, DEFENDANT, APPELLANT. UNITED STATES, APPELLEE, v. WALTER ANTONIO PALACIO-PEREZ, DEFENDANT, APPELLANT. UNITED STATES, APPELLEE, v. CARLOS AREVALO-GOMEZ, DEFENDANT, APPELLANT. Nos. 90-1980 to 90-1983.United States Court of Appeals, First Circuit.Heard June 3, 1991. Decided September 10, 1991. Rehearing and Rehearing En Banc […]