A mistrial was declared in the case against an Arizona farmer who was accused of using an AK-47 to shoot and kill a migrant who trespassed on his property near the Mexican border. George Alan Kelly, 75, was charged with the second-degree murder of Gabriel Cuen-Buitimea. The 48-year-old victim resided in the Mexican border city of Nogales. Defense Attorney Kathy Lowthorp told reporters outside the courthouse that seven jurors voted for acquittal, while one believed he was guilty. Deliberations began on Thursday and lasted for more than two days. Law enforcement alleges that Cuen-Buitimea and ot…