McALLEN — Grisber Calero, a college student from violence-torn Nicaragua, is lying on a hospital bed in this border city, minutes away from surgery. The athletic 21-year-old seems calm and jovial, but he admits he’s scared. He’s fighting a nasty infection from a gunshot wound that has left him numb below the right knee. Harlingen lawyer Jodi Goodwin, who helped spring Grisber from U.S.