MONTICELLO, Iowa (AP) — An Illinois man has been sentenced to life in prison for killing an Iowa grocery store worker in what police called a “random act of violence.”

Nathan Russell, who lives in the northwestern Illinois border city of East Dubuque, withdrew a not-guilty plea Tuesday and pleaded guilty to first-degree murder in the Nov. 7 shooting death of 48-year-old Aaron McAtee, KCRG-TV reported. McAtee was shot outside Fareway Meat and Grocery in Monticello, an eastern Iowa community of about 4,000 residents.

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The judge heard from McAtee’s relatives before sentencing Russell to life in prison.

“I feel like I died with Aaron that day,” said Aimee Jouanne, McAtee’s sister. “My happiness is at a standstill.”

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A victim’s advocate read a letter from McAtee’s mother, who said her heart “is broken for good.”

Police said McAtee was near a loading dock when Russell shot him. Russell was later spotted by a deputy about 10 miles (16 kilometers) away in Hopkinton, Iowa. The deputy shot and wounded Russell when he refused to comply, investigators said. A prosecutor ruled in December that the deputy was justified in the shooting.