Mistrial Declared in Case of Arizona Rancher Accused of Murdering Migrant

A judge on Monday declared a mistrial in the case of an Arizona rancher who was accused of murdering an unarmed migrant on his property after he crossed the U.S.-Mexico border last year, in a case that inflamed people on both sides of the national debate over immigration.

The mistrial was declared after jurors were unable to reach a unanimous verdict during deliberations that began on Thursday. The judge scheduled a hearing for April 29, according to the Arizona Superior Court in Santa Cruz County.

Calls on Monday evening to prosecutors and to Brenna Larkin, a lawyer for Mr. Kelly, were not immediately returned.

Gabriel Cuen-Buitimea was among a group of undocumented migrants who were crossing the high desert in Kino Springs, Ariz., near the border with Mexico on Jan. 30, 2023, when they spotted a Border Patrol vehicle and scattered, according to the authorities.

When two of the men, Mr. Cuen-Buitimea and Daniel Ramirez, ran onto George Alan Kelly’s 170-acre ranch, Mr. Kelly fired his AK-47-style rifle at them, the authorities said. Mr. Cuen-Buitimea 48, who had crossed into the United States from his native Mexico in search of work, was hit in the back, law enforcement officials said.

Hardened immigration critics and conservative ranchers seized on the case, casting Mr. Kelly as the real victim in posts on social media and saying that the episode was evidence of a growing threat to their security and livelihoods. But many in Santa Cruz County were horrified by the killing and viewed the surge in migrants crossing the border as a humanitarian crisis.